210724 -- TOKYO, July 24, 2021 -- Shao Jieni of Portugal celebrates after winning the Table tennis, Tischtennis women s singles first round match against Christina Kaellberg of Sweden at the Tokyo 2020 Olympic Games, Olympische Spiele, Olympia, OS in Tokyo, Japan, July 24, 2021. TOKYO2020 XHTP-JAPAN-TOKYO-OLY-TABLE TENNIS-WOMEN S SINGLES WangxDongzhen PUBLICATIONxNOTxINxCHN

210724 -- TOKYO, July 24, 2021 -- Shao Jieni of Portugal serves during the Table tennis, Tischtennis women s singles first round match against Christina Kaellberg of Sweden at the Tokyo 2020 Olympic Games, Olympische Spiele, Olympia, OS in Tokyo, Japan, July 24, 2021. TOKYO2020 JAPAN-TOKYO-OLY-TABLE TENNIS-WOMEN S SINGLES PanxYulong PUBLICATIONxNOTxINxCHN

DJOKOVIC Novak (SRB) JULY 24, 2021 - Tennis: Men's Singles 1st Round during the Tokyo 2020 Olympic Games at the Ariake Tennis Park in Tokyo, Japan. (Photo by MATSUO.K/AFLO SPORT)

DJOKOVIC Novak (SRB) JULY 24, 2021 - Tennis: Men's Singles 1st Round during the Tokyo 2020 Olympic Games at the Ariake Tennis Park in Tokyo, Japan. (Photo by MATSUO.K/AFLO SPORT)

DJOKOVIC Novak (SRB) JULY 24, 2021 - Tennis: Men's Singles 1st Round during the Tokyo 2020 Olympic Games at the Ariake Tennis Park in Tokyo, Japan. (Photo by MATSUO.K/AFLO SPORT)

Yuichi Sugita (JPN), JULY 24, 2021 - Tennis : Men's Singles 1st Round during the Tokyo 2020 Olympic Games at the Ariake Tennis Park in Tokyo, Japan. (Photo by MATSUO.K/AFLO SPORT)

Misaki Doi (JPN), JULY 24, 2021 - Tennis : Women's Singles 1st Round during the Tokyo 2020 Olympic Games at the Ariake Tennis Park in Tokyo, Japan. (Photo by MATSUO.K/AFLO SPORT)

Misaki Doi (JPN), JULY 24, 2021 - Tennis : Women's Singles 1st Round during the Tokyo 2020 Olympic Games at the Ariake Tennis Park in Tokyo, Japan. (Photo by MATSUO.K/AFLO SPORT)

210724 -- TOKYO, July 24, 2021 -- Novak Djokovic of Serbia hits a return during the tennis men s singles first round match against Hugo Dellien of Bolivia at the Tokyo 2020 Olympic Games, Olympische Spiele, Olympia, OS in Tokyo, Japan, July 24, 2021. TOKYO2020JAPAN-TOKYO-OLY-TENNIS-DJOKOVIC-HUGO FeixMaohua PUBLICATIONxNOTxINxCHN

210724 -- TOKYO, July 24, 2021 -- Novak Djokovic of Serbia receives an interview after the tennis men s singles first round match against Hugo Dellien of Bolivia at the Tokyo 2020 Olympic Games, Olympische Spiele, Olympia, OS in Tokyo, Japan, July 24, 2021. TOKYO2020JAPAN-TOKYO-OLY-TENNIS-DJOKOVIC-HUGO LixYibo PUBLICATIONxNOTxINxCHN

210724 -- TOKYO, July 24, 2021 -- Novak Djokovic of Serbia serves during the tennis men s singles first round match against Hugo Dellien of Bolivia at the Tokyo 2020 Olympic Games, Olympische Spiele, Olympia, OS in Tokyo, Japan, July 24, 2021. TOKYO2020XHTP-JAPAN-TOKYO-OLY-TENNIS-DJOKOVIC-HUGO FeixMaohua PUBLICATIONxNOTxINxCHN

210724 -- TOKYO, July 24, 2021 -- Novak Djokovic of Serbia hits a return during the Table tennis, Tischtennis men s singles first round match against Hugo Dellien of Bolivia at the Tokyo 2020 Olympic Games, Olympische Spiele, Olympia, OS in Tokyo, Japan, July 24, 2021. TOKYO2020XHTP-JAPAN-TOKYO-OLY-TENNIS-DJOKOVIC-HUGO FeixMaohua PUBLICATIONxNOTxINxCHN

210724 -- TOKYO, July 24, 2021 -- Novak Djokovic of Serbia hits a return during the tennis men s singles first round match against Hugo Dellien of Bolivia at the Tokyo 2020 Olympic Games, Olympische Spiele, Olympia, OS in Tokyo, Japan, July 24, 2021. TOKYO2020XHTP-JAPAN-TOKYO-OLY-TENNIS-DJOKOVIC-HUGO FeixMaohua PUBLICATIONxNOTxINxCHN

210724 -- TOKYO, July 24, 2021 -- Novak Djokovic of Serbia hits a return during the tennis men s singles first round match against Hugo Dellien of Bolivia at the Tokyo 2020 Olympic Games, Olympische Spiele, Olympia, OS in Tokyo, Japan, July 24, 2021. TOKYO2020XHTP-JAPAN-TOKYO-OLY-TENNIS-DJOKOVIC-HUGO FeixMaohua PUBLICATIONxNOTxINxCHN

210724 -- TOKYO, July 24, 2021 -- Novak Djokovic of Serbia hits a return during the tennis men s singles first round match against Hugo Dellien of Bolivia at the Tokyo 2020 Olympic Games, Olympische Spiele, Olympia, OS in Tokyo, Japan, July 24, 2021. TOKYO2020JAPAN-TOKYO-OLY-TENNIS-DJOKOVIC-HUGO LixYibo PUBLICATIONxNOTxINxCHN

210724 -- TOKYO, July 24, 2021 -- Novak Djokovic of Serbia celebrates his winning after the tennis men s singles first round match against Hugo Dellien of Bolivia at the Tokyo 2020 Olympic Games, Olympische Spiele, Olympia, OS in Tokyo, Japan, July 24, 2021. TOKYO2020JAPAN-TOKYO-OLY-TENNIS-DJOKOVIC-HUGO LixYibo PUBLICATIONxNOTxINxCHN

210724 -- TOKYO, July 24, 2021 -- Novak Djokovic of Serbia cools down his body during the tennis men s singles first round match against Hugo Dellien of Bolivia at the Tokyo 2020 Olympic Games, Olympische Spiele, Olympia, OS in Tokyo, Japan, July 24, 2021. TOKYO2020XHTP-JAPAN-TOKYO-OLY-TENNIS-DJOKOVIC-HUGO FeixMaohua PUBLICATIONxNOTxINxCHN

210724 -- TOKYO, July 24, 2021 -- Novak Djokovic of Serbia celebrates his winning after the tennis men s singles first round match against Hugo Dellien of Bolivia at the Tokyo 2020 Olympic Games, Olympische Spiele, Olympia, OS in Tokyo, Japan, July 24, 2021. TOKYO2020JAPAN-TOKYO-OLY-TENNIS-DJOKOVIC-HUGO LixYibo PUBLICATIONxNOTxINxCHN

210724 -- TOKYO, July 24, 2021 -- Novak Djokovic of Serbia shakes hands with Hugo Dellien of Bolivia after the tennis men s singles first round match at the Tokyo 2020 Olympic Games, Olympische Spiele, Olympia, OS in Tokyo, Japan, July 24, 2021. TOKYO2020JAPAN-TOKYO-OLY-TENNIS-DJOKOVIC-HUGO LixYibo PUBLICATIONxNOTxINxCHN

210724 -- TOKYO, July 24, 2021 -- Novak Djokovic of Serbia serves during the tennis men s singles first round match against Hugo Dellien of Bolivia at the Tokyo 2020 Olympic Games, Olympische Spiele, Olympia, OS in Tokyo, Japan, July 24, 2021. TOKYO2020XHTP-JAPAN-TOKYO-OLY-TENNIS-DJOKOVIC-HUGO FeixMaohua PUBLICATIONxNOTxINxCHN

210724 -- TOKYO, July 24, 2021 -- Brian Afanador of Puerto Rico competes during the Table tennis, Tischtennis men s singles first round match against Lam Siu Hang of Hong Kong, China at the Tokyo 2020 Olympic Games, Olympische Spiele, Olympia, OS in Tokyo, Japan, July 24, 2021. TOKYO2020 JAPAN-TOKYO-OLY-TABLE TENNIS-MEN S SINGLES WangxDongzhen PUBLICATIONxNOTxINxCHN

(L to R) Mima Ito (JPN), Jun Mizutani (JPN), JULY 24, 2021 - Table Tennis : Mixed doubles first round match during the Tokyo 2020 Olympic Games at the Tokyo Metropolitan Gymnasium in Tokyo, Japan. (Photo by Koji Aoki/AFLO SPORT)

Ben McLachlan (JPN), JULY 24, 2021 - Tennis : Men's Singles 1st Round during the Tokyo 2020 Olympic Games at the Ariake Tennis Park in Tokyo, Japan. (Photo by MATSUO.K/AFLO SPORT)

Ben McLachlan (JPN), JULY 24, 2021 - Tennis : Men's Singles 1st Round during the Tokyo 2020 Olympic Games at the Ariake Tennis Park in Tokyo, Japan. (Photo by MATSUO.K/AFLO SPORT)

Ben McLachlan (JPN), JULY 24, 2021 - Tennis : Men's Singles 1st Round during the Tokyo 2020 Olympic Games at the Ariake Tennis Park in Tokyo, Japan. (Photo by MATSUO.K/AFLO SPORT)

Kei Nishikori (JPN), JULY 24, 2021 - Tennis : Men's Doubles 1st Round during the Tokyo 2020 Olympic Games at the Ariake Tennis Park in Tokyo, Japan. (Photo by MATSUO.K/AFLO SPORT)

Ben McLachlan (JPN), JULY 24, 2021 - Tennis : Men's Doubles 1st Round during the Tokyo 2020 Olympic Games at the Ariake Tennis Park in Tokyo, Japan. (Photo by MATSUO.K/AFLO SPORT)

Ben McLachlan (JPN), JULY 24, 2021 - Tennis : Men's Doubles 1st Round during the Tokyo 2020 Olympic Games at the Ariake Tennis Park in Tokyo, Japan. (Photo by MATSUO.K/AFLO SPORT)

SONEGO Lorenzo (ITA), JULY 24, 2021 - Tennis: Men's Singles 1st Round during the Tokyo 2020 Olympic Games at the Ariake Tennis Park in Tokyo, Japan. (Photo by MATSUO.K/AFLO SPORT)

Ben McLachlan (JPN), JULY 24, 2021 - Tennis : Men's Doubles 1st Round during the Tokyo 2020 Olympic Games at the Ariake Tennis Park in Tokyo, Japan. (Photo by MATSUO.K/AFLO SPORT)

Ben McLachlan (JPN), JULY 24, 2021 - Tennis : Men's Doubles 1st Round during the Tokyo 2020 Olympic Games at the Ariake Tennis Park in Tokyo, Japan. (Photo by MATSUO.K/AFLO SPORT)

Ben McLachlan (JPN), JULY 24, 2021 - Tennis : Men's Doubles 1st Round during the Tokyo 2020 Olympic Games at the Ariake Tennis Park in Tokyo, Japan. (Photo by MATSUO.K/AFLO SPORT)

Kei Nishikori (JPN), JULY 24, 2021 - Tennis : Men's Doubles 1st Round during the Tokyo 2020 Olympic Games at the Ariake Tennis Park in Tokyo, Japan. (Photo by MATSUO.K/AFLO SPORT)

Kei Nishikori & Ben McLachlan (JPN), JULY 24, 2021 - Tennis : Men's Doubles 1st Round during the Tokyo 2020 Olympic Games at the Ariake Tennis Park in Tokyo, Japan. (Photo by MATSUO.K/AFLO SPORT)

Kei Nishikori (JPN), JULY 24, 2021 - Tennis : Men's Doubles 1st Round during the Tokyo 2020 Olympic Games at the Ariake Tennis Park in Tokyo, Japan. (Photo by MATSUO.K/AFLO SPORT)

Nao Hibino & Makoto Ninomiya (JPN), JULY 24, 2021 - Tennis : Women's Doubles 1st Round during the Tokyo 2020 Olympic Games at the Ariake Tennis Park in Tokyo, Japan. (Photo by MATSUO.K/AFLO SPORT)

Nao Hibino & Makoto Ninomiya (JPN), JULY 24, 2021 - Tennis : Women's Doubles 1st Round during the Tokyo 2020 Olympic Games at the Ariake Tennis Park in Tokyo, Japan. (Photo by MATSUO.K/AFLO SPORT)

Makoto Ninomiya (JPN), JULY 24, 2021 - Tennis : Women's Doubles 1st Round during the Tokyo 2020 Olympic Games at the Ariake Tennis Park in Tokyo, Japan. (Photo by MATSUO.K/AFLO SPORT)

Kei Nishikori & Ben McLachlan (JPN), JULY 24, 2021 - Tennis : Men's Doubles 1st Round during the Tokyo 2020 Olympic Games at the Ariake Tennis Park in Tokyo, Japan. (Photo by MATSUO.K/AFLO SPORT)

Makoto Ninomiya (JPN), JULY 24, 2021 - Tennis : Women's Doubles 1st Round during the Tokyo 2020 Olympic Games at the Ariake Tennis Park in Tokyo, Japan. (Photo by MATSUO.K/AFLO SPORT)

Nao Hibino & Makoto Ninomiya (JPN), JULY 24, 2021 - Tennis : Women's Doubles 1st Round during the Tokyo 2020 Olympic Games at the Ariake Tennis Park in Tokyo, Japan. (Photo by MATSUO.K/AFLO SPORT)

Nao Hibino & Makoto Ninomiya (JPN), JULY 24, 2021 - Tennis : Women's Doubles 1st Round during the Tokyo 2020 Olympic Games at the Ariake Tennis Park in Tokyo, Japan. (Photo by MATSUO.K/AFLO SPORT)

Makoto Ninomiya (JPN), JULY 24, 2021 - Tennis : Women's Doubles 1st Round during the Tokyo 2020 Olympic Games at the Ariake Tennis Park in Tokyo, Japan. (Photo by MATSUO.K/AFLO SPORT)

Makoto Ninomiya (JPN), JULY 24, 2021 - Tennis : Women's Doubles 1st Round during the Tokyo 2020 Olympic Games at the Ariake Tennis Park in Tokyo, Japan. (Photo by MATSUO.K/AFLO SPORT)

Makoto Ninomiya (JPN), JULY 24, 2021 - Tennis : Women's Doubles 1st Round during the Tokyo 2020 Olympic Games at the Ariake Tennis Park in Tokyo, Japan. (Photo by MATSUO.K/AFLO SPORT)

Misaki Doi (JPN), JULY 24, 2021 - Tennis : Women's Singles 1st Round during the Tokyo 2020 Olympic Games at the Ariake Tennis Park in Tokyo, Japan. (Photo by MATSUO.K/AFLO SPORT)

Misaki Doi (JPN), JULY 24, 2021 - Tennis : Women's Singles 1st Round during the Tokyo 2020 Olympic Games at the Ariake Tennis Park in Tokyo, Japan. (Photo by MATSUO.K/AFLO SPORT)

Misaki Doi (JPN), JULY 24, 2021 - Tennis : Women's Singles 1st Round during the Tokyo 2020 Olympic Games at the Ariake Tennis Park in Tokyo, Japan. (Photo by MATSUO.K/AFLO SPORT)

Misaki Doi (JPN), JULY 24, 2021 - Tennis : Women's Singles 1st Round during the Tokyo 2020 Olympic Games at the Ariake Tennis Park in Tokyo, Japan. (Photo by MATSUO.K/AFLO SPORT)

Misaki Doi (JPN), JULY 24, 2021 - Tennis : Women's Singles 1st Round during the Tokyo 2020 Olympic Games at the Ariake Tennis Park in Tokyo, Japan. (Photo by MATSUO.K/AFLO SPORT)

Misaki Doi (JPN), JULY 24, 2021 - Tennis : Women's Singles 1st Round during the Tokyo 2020 Olympic Games at the Ariake Tennis Park in Tokyo, Japan. (Photo by MATSUO.K/AFLO SPORT)

Misaki Doi (JPN), JULY 24, 2021 - Tennis : Women's Singles 1st Round during the Tokyo 2020 Olympic Games at the Ariake Tennis Park in Tokyo, Japan. (Photo by MATSUO.K/AFLO SPORT)

Misaki Doi (JPN), JULY 24, 2021 - Tennis : Women's Singles 1st Round during the Tokyo 2020 Olympic Games at the Ariake Tennis Park in Tokyo, Japan. (Photo by MATSUO.K/AFLO SPORT)

Misaki Doi (JPN), JULY 24, 2021 - Tennis : Women's Singles 1st Round during the Tokyo 2020 Olympic Games at the Ariake Tennis Park in Tokyo, Japan. (Photo by MATSUO.K/AFLO SPORT)

Yuichi Sugita (JPN), JULY 24, 2021 - Tennis : Men's Singles 1st Round during the Tokyo 2020 Olympic Games at the Ariake Tennis Park in Tokyo, Japan. (Photo by MATSUO.K/AFLO SPORT)

Yuichi Sugita (JPN), JULY 24, 2021 - Tennis : Men's Singles 1st Round during the Tokyo 2020 Olympic Games at the Ariake Tennis Park in Tokyo, Japan. (Photo by MATSUO.K/AFLO SPORT)

Yuichi Sugita (JPN), JULY 24, 2021 - Tennis : Men's Singles 1st Round during the Tokyo 2020 Olympic Games at the Ariake Tennis Park in Tokyo, Japan. (Photo by MATSUO.K/AFLO SPORT)

Yuichi Sugita (JPN), JULY 24, 2021 - Tennis : Men's Singles 1st Round during the Tokyo 2020 Olympic Games at the Ariake Tennis Park in Tokyo, Japan. (Photo by MATSUO.K/AFLO SPORT)

Yuichi Sugita (JPN), JULY 24, 2021 - Tennis : Men's Singles 1st Round during the Tokyo 2020 Olympic Games at the Ariake Tennis Park in Tokyo, Japan. (Photo by MATSUO.K/AFLO SPORT)

Taro Daniel (JPN), JULY 24, 2021 - Tennis : Men's Singles 1st Round during the Tokyo 2020 Olympic Games at the Ariake Tennis Park in Tokyo, Japan. (Photo by MATSUO.K/AFLO SPORT)

Taro Daniel (JPN), JULY 24, 2021 - Tennis : Men's Singles 1st Round during the Tokyo 2020 Olympic Games at the Ariake Tennis Park in Tokyo, Japan. (Photo by MATSUO.K/AFLO SPORT)

Taro Daniel (JPN), JULY 24, 2021 - Tennis : Men's Singles 1st Round during the Tokyo 2020 Olympic Games at the Ariake Tennis Park in Tokyo, Japan. (Photo by MATSUO.K/AFLO SPORT)

Taro Daniel (JPN), JULY 24, 2021 - Tennis : Men's Singles 1st Round during the Tokyo 2020 Olympic Games at the Ariake Tennis Park in Tokyo, Japan. (Photo by MATSUO.K/AFLO SPORT)

Taro Daniel (JPN), JULY 24, 2021 - Tennis : Men's Singles 1st Round during the Tokyo 2020 Olympic Games at the Ariake Tennis Park in Tokyo, Japan. (Photo by MATSUO.K/AFLO SPORT)

Taro Daniel (JPN), JULY 24, 2021 - Tennis : Men's Singles 1st Round during the Tokyo 2020 Olympic Games at the Ariake Tennis Park in Tokyo, Japan. (Photo by MATSUO.K/AFLO SPORT)

Taro Daniel (JPN), JULY 24, 2021 - Tennis : Men's Singles 1st Round during the Tokyo 2020 Olympic Games at the Ariake Tennis Park in Tokyo, Japan. (Photo by MATSUO.K/AFLO SPORT)

Taro Daniel (JPN), JULY 24, 2021 - Tennis : Men's Singles 1st Round during the Tokyo 2020 Olympic Games at the Ariake Tennis Park in Tokyo, Japan. (Photo by MATSUO.K/AFLO SPORT)

SAKKARI Maria (GRE), JULY 24, 2021 - Tennis: Women's Singles 1st Round during the Tokyo 2020 Olympic Games at the Ariake Tennis Park in Tokyo, Japan. (Photo by MATSUO.K/AFLO SPORT)

SAKKARI Maria (GRE), JULY 24, 2021 - Tennis: Women's Singles 1st Round during the Tokyo 2020 Olympic Games at the Ariake Tennis Park in Tokyo, Japan. (Photo by MATSUO.K/AFLO SPORT)

SAKKARI Maria (GRE), JULY 24, 2021 - Tennis: Women's Singles 1st Round during the Tokyo 2020 Olympic Games at the Ariake Tennis Park in Tokyo, Japan. (Photo by MATSUO.K/AFLO SPORT)

DJOKOVIC Novak (SRB) JULY 24, 2021 - Tennis: Men's Singles 1st Round during the Tokyo 2020 Olympic Games at the Ariake Tennis Park in Tokyo, Japan. (Photo by MATSUO.K/AFLO SPORT)

DJOKOVIC Novak (SRB) JULY 24, 2021 - Tennis: Men's Singles 1st Round during the Tokyo 2020 Olympic Games at the Ariake Tennis Park in Tokyo, Japan. (Photo by MATSUO.K/AFLO SPORT)

24 July 2021, Japan, Tokio: Tennis: Olympics, Doubles, 1st Round, Struff/Zverev (Germany) - Hurkacz/Kubot (Poland), at Ariake Tennis Park. Alexander Zverev (r) and Jan-Lennard Struff in action. Photo: Marijan Murat/dpa

24 July 2021, Japan, Tokio: Tennis: Olympics, doubles, 1st round, Struff/Zverev (Germany) - Hurkacz/Kubot (Poland), at Ariake Tennis Park. People walk past behind a transparent banner that says Tokyo. Photo: Marijan Murat/dpa

24 July 2021, Japan, Tokio: Tennis: Olympics, Doubles, 1st Round, Struff/Zverev (Germany) - Hurkacz/Kubot (Poland), at Ariake Tennis Park. Alexander Zverev (r) and Jan-Lennard Struff in action. Photo: Marijan Murat/dpa

24 July 2021, Japan, Tokio: Tennis: Olympics, Doubles, 1st Round, Struff/Zverev (Germany) - Hurkacz/Kubot (Poland), at Ariake Tennis Park. Alexander Zverev (r) and Jan-Lennard Struff in action. Photo: Marijan Murat/dpa

24 July 2021, Japan, Tokio: Tennis: Olympia, Doubles, 1st Round, Struff/Zverev (Germany) - Hurkacz/Kubot (Poland), at Ariake Tennis Park. Alexander Zverev (l) and Jan-Lennard Struff give each other five. Photo: Marijan Murat/dpa

24 July 2021, Japan, Tokio: Tennis: Olympics, Doubles, 1st Round, Struff/Zverev (Germany) - Hurkacz/Kubot (Poland), at Ariake Tennis Park. Alexander Zverev (l) and Jan-Lennard Struff in action. Photo: Marijan Murat/dpa

24 July 2021, Japan, Tokio: Tennis: Olympics, doubles, 1st round, Struff/Zverev (Germany) - Hurkacz/Kubot (Poland), at Ariake Tennis Park. Alexander Zverev (r) and Jan-Lennard Struff discuss. Photo: Marijan Murat/dpa

24 July 2021, Japan, Tokio: Tennis: Olympics, Doubles, 1st Round, Struff/Zverev (Germany) - Hurkacz/Kubot (Poland), at Ariake Tennis Park. Alexander Zverev (r) and Jan-Lennard Struff in action. Photo: Marijan Murat/dpa

210724 -- TOKYO, July 24, 2021 -- Christina Kaellberg of Sweden competes during the Table tennis, Tischtennis women s singles first round match against Shao Jieni of Portugal at the Tokyo 2020 Olympic Games, Olympische Spiele, Olympia, OS in Tokyo, Japan, July 24, 2021. TOKYO2020 JAPAN-TOKYO-OLY-TABLE TENNIS-WOMEN S SINGLES PanxYulong PUBLICATIONxNOTxINxCHN

210724 -- TOKYO, July 24, 2021 -- Christina Kaellberg of Sweden serves during the Table tennis, Tischtennis women s singles first round match against Shao Jieni of Portugal at the Tokyo 2020 Olympic Games, Olympische Spiele, Olympia, OS in Tokyo, Japan, July 24, 2021. TOKYO2020XHTP-JAPAN-TOKYO-OLY-TABLE TENNIS-WOMEN S SINGLES PanxYulong PUBLICATIONxNOTxINxCHN

Yuichi Sugita (JPN), JULY 24, 2021 - Tennis : Men's Singles 1st Round during the Tokyo 2020 Olympic Games at the Ariake Tennis Park in Tokyo, Japan. (Photo by MATSUO.K/AFLO SPORT)

Yuichi Sugita (JPN), JULY 24, 2021 - Tennis : Men's Singles 1st Round during the Tokyo 2020 Olympic Games at the Ariake Tennis Park in Tokyo, Japan. (Photo by MATSUO.K/AFLO SPORT)

24 July 2021, Japan, Tokio: Tennis: Olympics, Women's singles, 1st round, Friedsam (Germany) - Watson (Great Britain) at Ariake Tennis Park. Anna-Lena Friedsam from Germany in action. Photo: Michael Kappeler/dpa

24 July 2021, Japan, Tokio: Tennis: Olympics, women's singles, 1st round, Friedsam (Germany) - Watson (Great Britain) at Ariake Tennis Park. Anna-Lena Friedsam from Germany refreshes herself. Friedsam puts a bag with ice on her head to cool down. Photo: Michael Kappeler/dpa

24 July 2021, Japan, Tokio: Tennis: Olympics, Women's singles, 1st round, Friedsam (Germany) - Watson (Great Britain) at Ariake Tennis Park. Anna-Lena Friedsam from Germany in action. Photo: Michael Kappeler/dpa

24 July 2021, Japan, Tokio: Tennis: Olympia, Doubles, 1st Round, Krawietz/Putz (Germany) - Bagnis/Schwartzman (Argentina) at Ariake Tennis Park. Kevin Krawietz (r) from Germany and Tim Putz from Germany react. Photo: Michael Kappeler/dpa

24 July 2021, Japan, Tokio: Tennis: Olympics, men's singles, 1st round, Struff (Germany) - Monteiro (Brazil), at Ariake Tennis Park. Jan-Lennard Struff in action. Michael Kohlmann (l), team captain of the German Tennis Federation, follows the match. Photo: Marijan Murat/dpa

24 July 2021, Japan, Tokio: Tennis: Olympics, men's singles, 1st round, Struff (Germany) - Monteiro (Brazil), at Ariake Tennis Park. Michael Kohlmann (l), team captain of the German Tennis Federation, drinks some water in the high temperatures. A photographer seeks protection from the sun with a capy and towel. Photo: Marijan Murat/dpa

24 July 2021, Japan, Tokio: Tennis: Olympics, men's singles, 1st round, Struff (Germany) - Monteiro (Brazil), at Ariake Tennis Park. Michael Kohlmann, team captain of the German Tennis Federation, follows the match. Photo: Marijan Murat/dpa

24 July 2021, Japan, Tokio: Tennis: Olympia, Doubles, 1st Round, Krawietz/Putz (Germany) - Bagnis/Schwartzman (Argentina) at Ariake Tennis Park. Kevin Krawietz (M) from Germany and Tim Putz from Germany in action. Photo: Michael Kappeler/dpa

24 July 2021, Japan, Tokio: Tennis: Olympia, Doubles, 1st Round, Krawietz/Putz (Germany) - Bagnis/Schwartzman (Argentina) at Ariake Tennis Park. Kevin Krawietz (r) from Germany and Tim Putz from Germany talk to each other. Photo: Michael Kappeler/dpa

24 July 2021, Japan, Tokio: Tennis: Olympics, men's singles, 1st round, Djokovic (Serbia) - Dellien (Bolivia), at Ariake Tennis Park. Novak Djokovic reacts after the match ended. He the singles with 6:2, 6:2 against Dellien. Photo: Marijan Murat/dpa

24 July 2021, Japan, Tokio: Tennis: Olympics, men's singles, 1st round, Djokovic (Serbia) - Dellien (Bolivia), at Ariake Tennis Park. Novak Djokovic reacts. Photo: Marijan Murat/dpa

24 July 2021, Japan, Tokio: Tennis: Olympics, men's singles, 1st round, Djokovic (Serbia) - Dellien (Bolivia), at Ariake Tennis Park. Novak Djokovic reacts after the match ended. He the singles with 6:2, 6:2 against Dellien. Photo: Marijan Murat/dpa

24 July 2021, Japan, Tokio: Tennis: Olympics, men's singles, 1st round, Djokovic (Serbia) - Dellien (Bolivia), at Ariake Tennis Park. Novak Djokovic in action. Photo: Marijan Murat/dpa

24 July 2021, Japan, Tokio: Tennis: Olympics, men's singles, 1st round, Djokovic (Serbia) - Dellien (Bolivia), at Ariake Tennis Park. Novak Djokovic in action. Photo: Marijan Murat/dpa

24 July 2021, Japan, Tokio: Tennis: Olympics, men's singles, 1st round, Djokovic (Serbia) - Dellien (Bolivia), at Ariake Tennis Park. Novak Djokovic in action. Photo: Marijan Murat/dpa

24 July 2021, Japan, Tokio: Tennis: Olympics, men's singles, 1st round, Djokovic (Serbia) - Dellien (Bolivia), at Ariake Tennis Park. Novak Djokovic in action. Photo: Marijan Murat/dpa

24 July 2021, Japan, Tokio: Tennis: Olympics, men's singles, 1st round, Djokovic (Serbia) - Dellien (Bolivia), at Ariake Tennis Park. Novak Djokovic in action. Photo: Marijan Murat/dpa

24 July 2021, Japan, Tokio: Tennis: Olympics, men's singles, 1st round, Djokovic (Serbia) - Dellien (Bolivia), at Ariake Tennis Park. Novak Djokovic reacts. Photo: Marijan Murat/dpa

24 July 2021, Japan, Tokio: Tennis: Olympics, men's singles, 1st round, Djokovic (Serbia) - Dellien (Bolivia), at Ariake Tennis Park. Novak Djokovic in action. Photo: Marijan Murat/dpa

24 July 2021, Japan, Tokio: Tennis: Olympics, men's singles, 1st round, Djokovic (Serbia) - Dellien (Bolivia), at Ariake Tennis Park. Novak Djokovic in action. Photo: Marijan Murat/dpa

24 July 2021, Japan, Tokio: Tennis: Olympics, men's singles, 1st round, Djokovic (Serbia) - Dellien (Bolivia), at Ariake Tennis Park. Novak Djokovic in action. Photo: Marijan Murat/dpa

24 July 2021, Japan, Tokio: Tennis: Olympics, men's singles, 1st round, Struff (Germany) - Monteiro (Brazil), at Ariake Tennis Park. Michael Kohlmann (l), team captain of the German Tennis Federation, drinks some water in the high temperatures. Photo: Marijan Murat/dpa

24 July 2021, Japan, Tokio: Tennis: Olympics, men's singles, 1st round, Struff (Germany) - Monteiro (Brazil), at Ariake Tennis Park. Two staff members update the schedule with the seedings for the tournament. Photo: Marijan Murat/dpa

24 July 2021, Japan, Tokio: Tennis: Olympia, Doubles, 1st Round, Krawietz/Putz (Germany) - Bagnis/Schwartzman (Argentina) at Ariake Tennis Park. Kevin Krawietz from Germany in action. Photo: Michael Kappeler/dpa

24 July 2021, Japan, Tokio: Tennis: Olympia, Doubles, 1st Round, Krawietz/Putz (Germany) - Bagnis/Schwartzman (Argentina) at Ariake Tennis Park. Kevin Krawietz (l) from Germany and Tim Putz from Germany discuss during the break. Photo: Michael Kappeler/dpa

24 July 2021, Japan, Tokio: Tennis: Olympia, Doubles, 1st Round, Krawietz/Putz (Germany) - Bagnis/Schwartzman (Argentina) at Ariake Tennis Park. Kevin Krawietz (r) from Germany and Tim Putz from Germany in action. Photo: Michael Kappeler/dpa

24 July 2021, Japan, Tokio: Tennis: Olympics, men's singles, 1st round, Struff (Germany) - Monteiro (Brazil), at Ariake Tennis Park. Jan-Lennard Struff in action. Photo: Marijan Murat/dpa

24 July 2021, Japan, Tokio: Tennis: Olympics, men's singles, 1st round, Struff (Germany) - Monteiro (Brazil), at Ariake Tennis Park. Jan-Lennard Struff in action. Photo: Marijan Murat/dpa

24 July 2021, Japan, Tokio: Tennis: Olympics, men's singles, 1st round, Struff (Germany) - Monteiro (Brazil), at Ariake Tennis Park. Jan-Lennard Struff in action. Photo: Marijan Murat/dpa

24 July 2021, Japan, Tokio: Tennis: Olympics, men's singles, 1st round, Struff (Germany) - Monteiro (Brazil), at Ariake Tennis Park. Jan-Lennard Struff in action. Photo: Marijan Murat/dpa

24 July 2021, Japan, Tokio: Tennis: Olympics, men's singles, 1st round, Struff (Germany) - Monteiro (Brazil), at Ariake Tennis Park. Jan-Lennard Struff in action. Photo: Marijan Murat/dpa

24 July 2021, Japan, Tokio: Tennis: Olympics, men's singles, 1st round, Struff (Germany) - Monteiro (Brazil), at Ariake Tennis Park. Jan-Lennard Struff in action. Photo: Marijan Murat/dpa

24 July 2021, Japan, Tokio: Tennis: Olympics, men's singles, 1st round, Struff (Germany) - Monteiro (Brazil), at Ariake Tennis Park. Jan-Lennard Struff serves. Photo: Marijan Murat/dpa

24 July 2021, Japan, Tokio: Tennis: Olympics, men's doubles, 1st round, Murray (Great Britain) / Salisbury (Great Britain) - Mahut (France) / Herbert (France), Tokyo Metropolitan Gymnasium. Andy Murray warms up before the match. Photo: Michael Kappeler/dpa

24 July 2021, Japan, Tokio: Tennis: Olympics, men's doubles, 1st round, Murray (Great Britain) / Salisbury (Great Britain) - Mahut (France) / Herbert (France), Tokyo Metropolitan Gymnasium. Andy Murray warms up before the match. Photo: Michael Kappeler/dpa

24 July 2021, Japan, Tokio: Tennis: Olympics, men's doubles, 1st round, Murray (Great Britain) / Salisbury (Great Britain) - Mahut (France) / Herbert (France), Tokyo Metropolitan Gymnasium. Andy Murray warms up before the match. Photo: Michael Kappeler/dpa

24 July 2021, Japan, Tokio: Tennis: Olympics, Women's singles, 1st round, Friedsam (Germany) - Watson (Great Britain) at Ariake Tennis Park. Anna-Lena Friedsam from Germany in action. Photo: Michael Kappeler/dpa

24 July 2021, Japan, Tokio: Tennis: Olympics, Women's singles, 1st round, Friedsam (Germany) - Watson (Great Britain) at Ariake Tennis Park. Anna-Lena Friedsam from Germany in action. Photo: Michael Kappeler/dpa

4/General view, JULY 24, 2021 - Tennis : Women's Singles 1st Round during the Tokyo 2020 Olympic Games at the Ariake Tennis Park in Tokyo, Japan. (Photo by MATSUO.K/AFLO SPORT)

Nao Hibino (JPN), JULY 24, 2021 - Tennis : Women's Singles 1st Round during the Tokyo 2020 Olympic Games at the Ariake Tennis Park in Tokyo, Japan. (Photo by MATSUO.K/AFLO SPORT)

Nao Hibino (JPN), JULY 24, 2021 - Tennis : Women's Singles 1st Round during the Tokyo 2020 Olympic Games at the Ariake Tennis Park in Tokyo, Japan. (Photo by MATSUO.K/AFLO SPORT)

Nao Hibino (JPN), JULY 24, 2021 - Tennis : Women's Singles 1st Round during the Tokyo 2020 Olympic Games at the Ariake Tennis Park in Tokyo, Japan. (Photo by MATSUO.K/AFLO SPORT)

Nao Hibino (JPN), JULY 24, 2021 - Tennis : Women's Singles 1st Round during the Tokyo 2020 Olympic Games at the Ariake Tennis Park in Tokyo, Japan. (Photo by MATSUO.K/AFLO SPORT)

Nao Hibino (JPN), JULY 24, 2021 - Tennis : Women's Singles 1st Round during the Tokyo 2020 Olympic Games at the Ariake Tennis Park in Tokyo, Japan. (Photo by MATSUO.K/AFLO SPORT)