Switzerland's Belinda Bencic reacts after losing a point to Belgium's Elise Mertens during their third round match at the Australian Open tennis championship in Melbourne, Australia, Saturday, Feb. 13, 2021.(AP Photo/Andy Brownbill)

Switzerland's Belinda Bencic hits a backhand return to Belgium's Elise Mertens during their third round match at the Australian Open tennis championship in Melbourne, Australia, Saturday, Feb. 13, 2021.(AP Photo/Andy Brownbill)

Sweden's Mikael Ymer serves to Greece's Stefanos Tsitsipas in their third round match at the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Hamish Blair)

Belgium's Elise Mertens serves to Switzerland's Belinda Bencic during their third round match at the Australian Open tennis championship in Melbourne, Australia, Saturday, Feb. 13, 2021.(AP Photo/Andy Brownbill)

Belgium's Elise Mertens returns to Switzerland's Belinda Bencic during their third round match at the Australian Open tennis championship in Melbourne, Australia, Saturday, Feb. 13, 2021.(AP Photo/Andy Brownbill)

Belgium's Elise Mertens reacts after winning a game against Switzerland's Belinda Bencic during their third round match at the Australian Open tennis championship in Melbourne, Australia, Saturday, Feb. 13, 2021.(AP Photo/Andy Brownbill)

Belgium's Elise Mertens sits in her seat between games during her third round match against Switzerland's Belinda Bencic at the Australian Open tennis championship in Melbourne, Australia, Saturday, Feb. 13, 2021.(AP Photo/Andy Brownbill)

Belgium's Elise Mertens hits a backhand return to Switzerland's Belinda Bencic during their third round match at the Australian Open tennis championship in Melbourne, Australia, Saturday, Feb. 13, 2021.(AP Photo/Andy Brownbill)

Switzerland's Belinda Bencic hits a forehand return to Belgium's Elise Mertens during their third round match at the Australian Open tennis championship in Melbourne, Australia, Saturday, Feb. 13, 2021.(AP Photo/Andy Brownbill)

Belgium's Elise Mertens serves to Switzerland's Belinda Bencic during their third round match at the Australian Open tennis championship in Melbourne, Australia, Saturday, Feb. 13, 2021.(AP Photo/Andy Brownbill)

Greece's Stefanos Tsitsipas hits a forehand to Sweden's Mikael Ymer during their third round match at the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Hamish Blair)

Belgium's Elise Mertens reacts after winning a point against Switzerland's Belinda Bencic during their third round match at the Australian Open tennis championship in Melbourne, Australia, Saturday, Feb. 13, 2021.(AP Photo/Andy Brownbill)

Belgium's Elise Mertens hits a forehand return to Switzerland's Belinda Bencic during their third round match at the Australian Open tennis championship in Melbourne, Australia, Saturday, Feb. 13, 2021.(AP Photo/Andy Brownbill)

Russia's Andrey Rublev hits a backhand return to Spain's Feliciano Lopez during their third round match at the Australian Open tennis championship in Melbourne, Australia, Saturday, Feb. 13, 2021.(AP Photo/Andy Brownbill)

Belgium's Elise Mertens celebrates after defeating Switzerland's Belinda Bencic in their third round match at the Australian Open tennis championship in Melbourne, Australia, Saturday, Feb. 13, 2021.(AP Photo/Andy Brownbill)

Russia's Karen Khachanov hits a backhand to Italy's Matteo Berrettini during their third round match at the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Hamish Blair)

Belgium's Elise Mertens celebrates after defeating Switzerland's Belinda Bencic in their third round match at the Australian Open tennis championship in Melbourne, Australia, Saturday, Feb. 13, 2021.(AP Photo/Andy Brownbill)

Belgium's Elise Mertens celebrates after defeating Switzerland's Belinda Bencic in their third round match at the Australian Open tennis championship in Melbourne, Australia, Saturday, Feb. 13, 2021.(AP Photo/Andy Brownbill)

Belgium's Elise Mertens celebrates after defeating Switzerland's Belinda Bencic in their third round match at the Australian Open tennis championship in Melbourne, Australia, Saturday, Feb. 13, 2021.(AP Photo/Andy Brownbill)

Belgium's Elise Mertens celebrates after defeating Switzerland's Belinda Bencic in their third round match at the Australian Open tennis championship in Melbourne, Australia, Saturday, Feb. 13, 2021.(AP Photo/Andy Brownbill)

Russia's Karen Khachanov prepares to serve to Italy's Matteo Berrettini during their third round match at the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Hamish Blair)

Belgium's Elise Mertens, right, is congratulated by Switzerland's Belinda Bencic after winning their third round match at the Australian Open tennis championship in Melbourne, Australia, Saturday, Feb. 13, 2021.(AP Photo/Andy Brownbill)

Belgium's Elise Mertens celebrates after defeating Switzerland's Belinda Bencic in their third round match at the Australian Open tennis championship in Melbourne, Australia, Saturday, Feb. 13, 2021.(AP Photo/Andy Brownbill)

Italy's Matteo Berrettini hits a forehand to Russia's Karen Khachanov during their third round match at the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Hamish Blair)

Italy's Matteo Berrettini yells out while playing Russia's Karen Khachanov during their third round match at the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Hamish Blair)

Italy's Matteo Berrettini celebrates a point while playing Russia's Karen Khachanov during their third round match at the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Hamish Blair)

Russia's Karen Khachanov hits a forehand to Italy's Matteo Berrettini during their third round match at the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Hamish Blair)

Russia's Karen Khachanov hits a backhand to Italy's Matteo Berrettini during their third round match at the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Hamish Blair)

Russia's Karen Khachanov hits a backhand to Italy's Matteo Berrettini during their third round match at the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Hamish Blair)

Russia's Karen Khachanov hits a forehand to Italy's Matteo Berrettini during their third round match at the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Hamish Blair)

Italy's Matteo Berrettini celebrates a point against Russia's Karen Khachanov during their third round match at the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Hamish Blair)

Italy's Matteo Berrettini hits a backhand to Russia's Karen Khachanov during their third round match at the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Hamish Blair)

Italy's Matteo Berrettini celebrates a point against Russia's Karen Khachanov during their third round match at the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Hamish Blair)

Italy's Matteo Berrettini hits a backhand to Russia's Karen Khachanov during their third round match at the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Hamish Blair)

Russia's Karen Khachanov smiles after playing a point against Italy's Matteo Berrettini during their third round match at the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Hamish Blair)

Russia's Karen Khachanov hits a backhand to Italy's Matteo Berrettini during their third round match at the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Hamish Blair)

Russia's Karen Khachanov hits a forehand to Italy's Matteo Berrettini during their third round match at the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Hamish Blair)

Italy's Matteo Berrettini, left, hits a backhand to Russia's Karen Khachanov during their third round match at the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. The Australian Open continues but without crowds after the Victoria state government imposed a five-day lockdown starting Saturday in response to a COVID-19 outbreak at a quarantine hotel. (AP Photo/Hamish Blair)

Italy's Matteo Berrettini hits a forehand to Russia's Karen Khachanov during their third round match at the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Hamish Blair)

Italy's Matteo Berrettini hits a forehand to Russia's Karen Khachanov during their third round match at the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Hamish Blair)

Russia's Karen Khachanov hits a forehand to Italy's Matteo Berrettini during their third round match at the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Hamish Blair)

Russia's Karen Khachanov reaches to hits a backhand to Italy's Matteo Berrettini during their third round match at the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Hamish Blair)

Italy's Matteo Berrettini hits a forehand to Russia's Karen Khachanov during their third round match at the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Hamish Blair)

Italy's Matteo Berrettini hits a backhand to Russia's Karen Khachanov during their third round match at the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Hamish Blair)

Italy's Matteo Berrettini hits a backhand to Russia's Karen Khachanov during their third round match at the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Hamish Blair)

Italy's Matteo Berrettini hits a forehand to Russia's Karen Khachanov during their third round match at the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Hamish Blair)

Australia's Ash Barty hits a backhand return to Russia's Ekaterina Alexandrova during their third round match at the Australian Open tennis championship in Melbourne, Australia, Saturday, Feb. 13, 2021.(AP Photo/Andy Brownbill)

Russia's Karen Khachanov hits a forehand to Italy's Matteo Berrettini during their third round match at the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Hamish Blair)

Australia's Ash Barty hits a backhand return to Russia's Ekaterina Alexandrova during their third round match at the Australian Open tennis championship in Melbourne, Australia, Saturday, Feb. 13, 2021.(AP Photo/Andy Brownbill)

Australia's Ash Barty hits a backhand return to Russia's Ekaterina Alexandrova during their third round match at the Australian Open tennis championship in Melbourne, Australia, Saturday, Feb. 13, 2021.(AP Photo/Andy Brownbill)

Australia's Ash Barty hits a forehand return to Russia's Ekaterina Alexandrova during their third round match at the Australian Open tennis championship in Melbourne, Australia, Saturday, Feb. 13, 2021.(AP Photo/Andy Brownbill)

Italy's Matteo Berrettini hits a forehand to Russia's Karen Khachanov during their third round match at the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Hamish Blair)

Russia's Ekaterina Alexandrova hits a backhand return to Australia's Ash Barty during their third round match at the Australian Open tennis championship in Melbourne, Australia, Saturday, Feb. 13, 2021.(AP Photo/Andy Brownbill)

Italy's Matteo Berrettini celebrates winning a point against Russia's Karen Khachanov during their third round match at the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Hamish Blair)

Australia's Ash Barty serves to Russia's Ekaterina Alexandrova during their third round match at the Australian Open tennis championship in Melbourne, Australia, Saturday, Feb. 13, 2021.(AP Photo/Andy Brownbill)

Russia's Ekaterina Alexandrova hits a forehand return to Australia's Ash Barty during their third round match at the Australian Open tennis championship in Melbourne, Australia, Saturday, Feb. 13, 2021.(AP Photo/Andy Brownbill)

Australia's Ash Barty hits a forehand return to Russia's Ekaterina Alexandrova during their third round match at the Australian Open tennis championship in Melbourne, Australia, Saturday, Feb. 13, 2021.(AP Photo/Andy Brownbill)

Russia's Ekaterina Alexandrova hits a forehand return to Australia's Ash Barty during their third round match at the Australian Open tennis championship in Melbourne, Australia, Saturday, Feb. 13, 2021.(AP Photo/Andy Brownbill)

Italy's Matteo Berrettini hits a forehand to Russia's Karen Khachanov during their third round match at the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Hamish Blair)

Russia's Karen Khachanov hits a backhand to Italy's Matteo Berrettini during their third round match at the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Hamish Blair)

Russia's Karen Khachanov hits a forehand to Italy's Matteo Berrettini during their third round match at the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Hamish Blair)

Estonia's Anett Kontaveit serves to United States' Shelby Rogers during their third round match at the Australian Open tennis championship in Melbourne, Australia, Saturday, Feb. 13, 2021.(AP Photo/Andy Brownbill)

Estonia's Anett Kontaveit hits a backhand return to United States' Shelby Rogers during their third round match at the Australian Open tennis championship in Melbourne, Australia, Saturday, Feb. 13, 2021.(AP Photo/Andy Brownbill)

United States' Shelby Rogers hits a backhand return to Estonia's Anett Kontaveit during their third round match at the Australian Open tennis championship in Melbourne, Australia, Saturday, Feb. 13, 2021.(AP Photo/Andy Brownbill)

Italy's Matteo Berrettini, left, receives medical treatment during a break while playing Russia's Karen Khachanov during their third round match at the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Hamish Blair)

Italy's Matteo Berrettini, right, receives medical treatment during a break while playing Russia's Karen Khachanov during their third round match at the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Hamish Blair)

Estonia's Anett Kontaveit hits a forehand return to United States' Shelby Rogers during their third round match at the Australian Open tennis championship in Melbourne, Australia, Saturday, Feb. 13, 2021.(AP Photo/Andy Brownbill)

Estonia's Anett Kontaveit hits a forehand return to United States' Shelby Rogers during their third round match at the Australian Open tennis championship in Melbourne, Australia, Saturday, Feb. 13, 2021.(AP Photo/Andy Brownbill)

United States' Shelby Rogers hits a forehand return to Estonia's Anett Kontaveit during their third round match at the Australian Open tennis championship in Melbourne, Australia, Saturday, Feb. 13, 2021.(AP Photo/Andy Brownbill)

United States' Shelby Rogers hits a backhand return to Estonia's Anett Kontaveit during their third round match at the Australian Open tennis championship in Melbourne, Australia, Saturday, Feb. 13, 2021.(AP Photo/Andy Brownbill)

United States' Shelby Rogers hits a backhand return to Estonia's Anett Kontaveit during their third round match at the Australian Open tennis championship in Melbourne, Australia, Saturday, Feb. 13, 2021.(AP Photo/Andy Brownbill)

Estonia's Anett Kontaveit sits in her chair between games during her third round match against United States' Shelby Rogers at the Australian Open tennis championship in Melbourne, Australia, Saturday, Feb. 13, 2021.(AP Photo/Andy Brownbill)

Estonia's Anett Kontaveit hits a backhand return to United States' Shelby Rogers during their third round match at the Australian Open tennis championship in Melbourne, Australia, Saturday, Feb. 13, 2021.(AP Photo/Andy Brownbill)

Estonia's Anett Kontaveit hits a forehand return to United States' Shelby Rogers during their third round match at the Australian Open tennis championship in Melbourne, Australia, Saturday, Feb. 13, 2021.(AP Photo/Andy Brownbill)

Estonia's Anett Kontaveit hits a forehand return to United States' Shelby Rogers during their third round match at the Australian Open tennis championship in Melbourne, Australia, Saturday, Feb. 13, 2021.(AP Photo/Andy Brownbill)

Italy's Matteo Berrettini, left, and Russia's Karen Khachanov meet at the net after Berrettini won their third round match at the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Hamish Blair)

Italy's Matteo Berrettini looks over his shoulder after defeating Russia's Karen Khachanov in their third round match at the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Hamish Blair)

United States' Shelby Rogers celebrates after defeating Estonia's Anett Kontaveit in their third round match at the Australian Open tennis championship in Melbourne, Australia, Saturday, Feb. 13, 2021.(AP Photo/Andy Brownbill)

United States' Shelby Rogers celebrates after defeating Estonia's Anett Kontaveit in their third round match at the Australian Open tennis championship in Melbourne, Australia, Saturday, Feb. 13, 2021.(AP Photo/Andy Brownbill)

United States' Shelby Rogers celebrates after defeating Estonia's Anett Kontaveit in their third round match at the Australian Open tennis championship in Melbourne, Australia, Saturday, Feb. 13, 2021.(AP Photo/Andy Brownbill)

United States' Shelby Rogers celebrates after defeating Estonia's Anett Kontaveit in their third round match at the Australian Open tennis championship in Melbourne, Australia, Saturday, Feb. 13, 2021.(AP Photo/Andy Brownbill)

United States' Shelby Rogers celebrates after defeating Estonia's Anett Kontaveit in their third round match at the Australian Open tennis championship in Melbourne, Australia, Saturday, Feb. 13, 2021.(AP Photo/Andy Brownbill)

United States' Shelby Rogers is interviewed after defeating Estonia's Anett Kontaveit in their third round match at the Australian Open tennis championship in Melbourne, Australia, Saturday, Feb. 13, 2021.(AP Photo/Andy Brownbill)

United States' Shelby Rogers reacts after winning a point against Estonia's Anett Kontaveit in their third round match at the Australian Open tennis championship in Melbourne, Australia, Saturday, Feb. 13, 2021.(AP Photo/Andy Brownbill)

United States' Shelby Rogers celebrates after defeating Estonia's Anett Kontaveit in their third round match at the Australian Open tennis championship in Melbourne, Australia, Saturday, Feb. 13, 2021.(AP Photo/Andy Brownbill)

Spain's Rafael Nadal, right, and Britain's Cameron Norrie, left, meet at the net for the coin toss before their third round match a the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Andy Brownbill)

Spain's Rafael Nadal hits a forehand to Britain's Cameron Norrie during their third round match a the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Andy Brownbill)

Britain's Cameron Norrie hits a forehand to Spain's Rafael Nadal during their third round match a the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Andy Brownbill)

Spain's Rafael Nadal wipes his face before serving to Britain's Cameron Norrie during their third round match a the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Andy Brownbill)

Britain's Cameron Norrie hits a forehand to Spain's Rafael Nadal during their third round match a the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Andy Brownbill)

Australia's Alex De Minaur hits a forehand to Italy's Fabio Fognini during their third round match at the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Hamish Blair)

Australia's Alex De Minaur hits a forehand to Italy's Fabio Fognini during their third round match at the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Hamish Blair)

Spain's Rafael Nadal hits a forehand to Britain's Cameron Norrie during their third round match a the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Andy Brownbill)

Spain's Rafael Nadal hits a backhand to Britain's Cameron Norrie during their third round match a the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Andy Brownbill)

Italy's Fabio Fognini hits a forehand to Australia's Alex De Minaur during their third round match at the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Hamish Blair)

Italy's Fabio Fognini celebrates a point over Australia's Alex De Minaur during their third round match at the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Hamish Blair)

Spain's Rafael Nadal, bottom, hits a backhand to Britain's Cameron Norrie during their third round match a the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. The Australian Open continues but without crowds after the Victoria state government imposed a five-day lockdown starting Saturday in response to a COVID-19 outbreak at a quarantine hotel. (AP Photo/Andy Brownbill)

Spain's Rafael Nadal, bottom, serves to Britain's Cameron Norrie during their third round match a the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Andy Brownbill)

Italy's Fabio Fognini hits a backhand to Australia's Alex De Minaur during their third round match at the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Hamish Blair)

Spain's Rafael Nadal hits a forehand to Britain's Cameron Norrie during their third round match a the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Andy Brownbill)

Spain's Rafael Nadal questions a call while playing Britain's Cameron Norrie during their third round match a the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Andy Brownbill)

Australia's Alex De Minaur uses his towel while playing Italy's Fabio Fognini during their third round match at the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Hamish Blair)

Britain's Cameron Norrie prepares to serve to Spain's Rafael Nadal during their third round match a the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Andy Brownbill)

Britain's Cameron Norrie prepares to serve to Spain's Rafael Nadal during their third round match a the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Andy Brownbill)

Britain's Cameron Norrie prepares to serve to Spain's Rafael Nadal during their third round match a the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Andy Brownbill)

Australia's Alex De Minaur hits a backhand to Italy's Fabio Fognini during their third round match at the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Hamish Blair)

Spain's Rafael Nadal serves to Britain's Cameron Norrie during their third round match a the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Andy Brownbill)

Spain's Rafael Nadal ties on his headband during a break while playing Britain's Cameron Norrie during their third round match a the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Andy Brownbill)

A ball kid tries to catch a moth on the court where Australia's Alex De Minaur and Italy's Fabio Fognini are playing their third round match at the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Hamish Blair)

Australia's Alex De Minaur hits a forehand to Italy's Fabio Fognini during their third round match at the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Hamish Blair)

Italy's Fabio Fognini celebrates winning the first set against Australia's Alex De Minaur during their third round match at the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Hamish Blair)

Italy's Fabio Fognini hits a forehand to Australia's Alex De Minaur during their third round match at the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Hamish Blair)

Britain's Cameron Norrie runs to hit a forehand to Spain's Rafael Nadal during their third round match a the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Andy Brownbill)

Spain??fs Rafael Nadal celebrates winning a point against Britain's Cameron Norrie during their third round match a the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Andy Brownbill)

Britain's Cameron Norrie closes his eyes after losing a point to Spain's Rafael Nadal during their third round match a the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Andy Brownbill)

Spain's Rafael Nadal waits for a serve from Britain's Cameron Norrie during their third round match a the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Andy Brownbill)

Spain's Rafael Nadal hits a backhand toBritain's Cameron Norrie during their third round match a the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Andy Brownbill)

Italy's Fabio Fognini reacts while playing against Australia's Alex De Minaur during their third round match at the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Hamish Blair)

Spain's Rafael Nadal hits a forehand toBritain's Cameron Norrie during their third round match a the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Andy Brownbill)

Australia's Alex De Minaur hits a forehand to Italy's Fabio Fognini during their third round match at the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Hamish Blair)

Spain's Rafael Nadal ties on his headband during a break while playing Britain's Cameron Norrie during their third round match a the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Andy Brownbill)

Spain's Rafael Nadal, left, and Britain's Cameron Norrie change ends during their third round match a the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Andy Brownbill)

Spain's Rafael Nadal, right, and Britain's Cameron Norrie change ends during their third round match a the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Andy Brownbill)

Italy's Fabio Fognini hits a forehand to Australia's Alex De Minaur during their third round match at the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Hamish Blair)

Spain's Rafael Nadal holds his head while playing Britain's Cameron Norrie during their third round match a the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Andy Brownbill)

Spain's Rafael Nadal hits a forehand to Britain's Cameron Norrie during their third round match a the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Andy Brownbill)

Italy's Fabio Fognini hits a forehand to Australia's Alex De Minaur during their third round match at the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Hamish Blair)

Britain's Cameron Norrie hits a forehand to Spain's Rafael Nadal during their third round match a the Australian Open tennis championships in Melbourne, Australia, Saturday, Feb. 13, 2021. (AP Photo/Andy Brownbill)