Anhelina Kalinina of Ukraine plays a forehand return to Petra Kvitova of the Czech Republic during their second round match at the Australian Open tennis championship in Melbourne, Australia, Wednesday, Jan. 18, 2023. (AP Photo/Aaron Favila)

Anhelina Kalinina of Ukraine serves to Petra Kvitova of the Czech Republic during their second round match at the Australian Open tennis championship in Melbourne, Australia, Wednesday, Jan. 18, 2023. (AP Photo/Aaron Favila)

Anhelina Kalinina of Ukraine plays a forehand return to Petra Kvitova of the Czech Republic during their second round match at the Australian Open tennis championship in Melbourne, Australia, Wednesday, Jan. 18, 2023. (AP Photo/Aaron Favila)

Petra Kvitova of the Czech Republic plays a forehand return to Anhelina Kalinina of Ukraine during their second round match at the Australian Open tennis championship in Melbourne, Australia, Wednesday, Jan. 18, 2023. (AP Photo/Aaron Favila)

Petra Kvitova of the Czech Republic prepares to serve to Anhelina Kalinina of Ukraine during their second round match at the Australian Open tennis championship in Melbourne, Australia, Wednesday, Jan. 18, 2023. (AP Photo/Aaron Favila)

Anhelina Kalinina of Ukraine plays a backhand return to Petra Kvitova of the Czech Republic during their second round match at the Australian Open tennis championship in Melbourne, Australia, Wednesday, Jan. 18, 2023. (AP Photo/Aaron Favila)

Petra Kvitova of the Czech Republic plays a forehand return to Anhelina Kalinina of Ukraine during their second round match at the Australian Open tennis championship in Melbourne, Australia, Wednesday, Jan. 18, 2023. (AP Photo/Aaron Favila)

Petra Kvitova of the Czech Republic plays a forehand return to Anhelina Kalinina of Ukraine during their second round match at the Australian Open tennis championship in Melbourne, Australia, Wednesday, Jan. 18, 2023. (AP Photo/Aaron Favila)

Anhelina Kalinina of Ukraine plays a backhand return to Petra Kvitova of the Czech Republic during their second round match at the Australian Open tennis championship in Melbourne, Australia, Wednesday, Jan. 18, 2023. (AP Photo/Aaron Favila)

Petra Kvitova of the Czech Republic plays a forehand return to Anhelina Kalinina of Ukraine during their second round match at the Australian Open tennis championship in Melbourne, Australia, Wednesday, Jan. 18, 2023. (AP Photo/Aaron Favila)

Petra Kvitova of the Czech Republic serves to Anhelina Kalinina of Ukraine during their second round match at the Australian Open tennis championship in Melbourne, Australia, Wednesday, Jan. 18, 2023. (AP Photo/Aaron Favila)

Petra Kvitova of the Czech Republic plays a forehand return to Anhelina Kalinina of Ukraine during their second round match at the Australian Open tennis championship in Melbourne, Australia, Wednesday, Jan. 18, 2023. (AP Photo/Aaron Favila)

Petra Kvitova of the Czech Republic plays a forehand return to Anhelina Kalinina of Ukraine during their second round match at the Australian Open tennis championship in Melbourne, Australia, Wednesday, Jan. 18, 2023. (AP Photo/Aaron Favila)

Spectators hold up a Ukraine flag as they watch the second round match between Anhelina Kalinina of Ukraine and Petra Kvitova of the Czech Republic at the Australian Open tennis championship in Melbourne, Australia, Wednesday, Jan. 18, 2023. (AP Photo/Aaron Favila)

Petra Kvitova of the Czech Republic plays a backhand return to Anhelina Kalinina of Ukraine during their second round match at the Australian Open tennis championship in Melbourne, Australia, Wednesday, Jan. 18, 2023. (AP Photo/Aaron Favila)

Anhelina Kalinina of Ukraine serves to Petra Kvitova of the Czech Republic during their second round match at the Australian Open tennis championship in Melbourne, Australia, Wednesday, Jan. 18, 2023. (AP Photo/Aaron Favila)

Petra Kvitova of the Czech Republic reacts after losing a point to Anhelina Kalinina of Ukraine during their second round match at the Australian Open tennis championship in Melbourne, Australia, Wednesday, Jan. 18, 2023. (AP Photo/Aaron Favila)

Anhelina Kalinina of Ukraine plays a forehand return to Petra Kvitova of the Czech Republic during their second round match at the Australian Open tennis championship in Melbourne, Australia, Wednesday, Jan. 18, 2023. (AP Photo/Aaron Favila)

Anhelina Kalinina, left, of Ukraine is congratulated by Petra Kvitova of the Czech Republic following their second round match at the Australian Open tennis championship in Melbourne, Australia, Wednesday, Jan. 18, 2023. (AP Photo/Aaron Favila)

Anhelina Kalinina, left, of Ukraine is congratulated by Petra Kvitova of the Czech Republic following their second round match at the Australian Open tennis championship in Melbourne, Australia, Wednesday, Jan. 18, 2023. (AP Photo/Aaron Favila)

Anhelina Kalinina of Ukraine celebrates after defeating Petra Kvitova of the Czech Republic following their second round match at the Australian Open tennis championship in Melbourne, Australia, Wednesday, Jan. 18, 2023. (AP Photo/Aaron Favila)

Anhelina Kalinina of Ukraine celebrates after defeating Petra Kvitova of the Czech Republic following their second round match at the Australian Open tennis championship in Melbourne, Australia, Wednesday, Jan. 18, 2023. (AP Photo/Aaron Favila)

Petra Kvitova of the Czech Republic reacts during her second round match against Anhelina Kalinina of Ukraine at the Australian Open tennis championship in Melbourne, Australia, Wednesday, Jan. 18, 2023. (AP Photo/Aaron Favila)

Petra Kvitova of the Czech Republic reacts during a break in her second round match against Anhelina Kalinina of Ukraine at the Australian Open tennis championship in Melbourne, Australia, Wednesday, Jan. 18, 2023. (AP Photo/Aaron Favila)

Ukraine's Anhelina Kalinina serves against Czech Republic's Petra Kvitova during their women's singles match on day three of the Australian Open tennis tournament in Melbourne on January 18, 2023. (Photo by WILLIAM WEST / AFP) / -- IMAGE RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE --

Ukraine's Anhelina Kalinina hits a return against Czech Republic's Petra Kvitova during their women's singles match on day three of the Australian Open tennis tournament in Melbourne on January 18, 2023. (Photo by WILLIAM WEST / AFP) / -- IMAGE RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE --

Ukraine's Anhelina Kalinina serves against Czech Republic's Petra Kvitova during their women's singles match on day three of the Australian Open tennis tournament in Melbourne on January 18, 2023. (Photo by WILLIAM WEST / AFP) / -- IMAGE RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE --

Czech Republic's Petra Kvitova reacts after a point against Ukraine's Anhelina Kalinina during their women's singles match on day three of the Australian Open tennis tournament in Melbourne on January 18, 2023. (Photo by WILLIAM WEST / AFP) / -- IMAGE RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE --

Czech Republic's Petra Kvitova reacts after a point against Ukraine's Anhelina Kalinina during their women's singles match on day three of the Australian Open tennis tournament in Melbourne on January 18, 2023. (Photo by WILLIAM WEST / AFP) / -- IMAGE RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE --

Ukraine's Anhelina Kalinina uses a towel during a break in her women's singles match against Czech Republic's Petra Kvitova on day three of the Australian Open tennis tournament in Melbourne on January 18, 2023. (Photo by WILLIAM WEST / AFP) / -- IMAGE RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE --

Czech Republic's Petra Kvitova reacts after a point against Ukraine's Anhelina Kalinina during their women's singles match on day three of the Australian Open tennis tournament in Melbourne on January 18, 2023. (Photo by WILLIAM WEST / AFP) / -- IMAGE RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE --

Czech Republic's Petra Kvitova reacts after a point against Ukraine's Anhelina Kalinina during their women's singles match on day three of the Australian Open tennis tournament in Melbourne on January 18, 2023. (Photo by WILLIAM WEST / AFP) / -- IMAGE RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE --

Czech Republic's Petra Kvitova hits a return against Ukraine's Anhelina Kalinina during their women's singles match on day three of the Australian Open tennis tournament in Melbourne on January 18, 2023. (Photo by WILLIAM WEST / AFP) / -- IMAGE RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE --

Czech Republic's Petra Kvitova hits a return against Ukraine's Anhelina Kalinina during their women's singles match on day three of the Australian Open tennis tournament in Melbourne on January 18, 2023. (Photo by WILLIAM WEST / AFP) / -- IMAGE RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE --

Czech Republic's Petra Kvitova hits a return against Ukraine's Anhelina Kalinina during their women's singles match on day three of the Australian Open tennis tournament in Melbourne on January 18, 2023. (Photo by WILLIAM WEST / AFP) / -- IMAGE RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE --

Czech Republic's Petra Kvitova hits a return against Ukraine's Anhelina Kalinina during their women's singles match on day three of the Australian Open tennis tournament in Melbourne on January 18, 2023. (Photo by WILLIAM WEST / AFP) / -- IMAGE RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE --

Czech Republic's Petra Kvitova (R) rests during a break in her women's singles match against Ukraine's Anhelina Kalinina on day three of the Australian Open tennis tournament in Melbourne on January 18, 2023. (Photo by WILLIAM WEST / AFP) / -- IMAGE RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE --

Ukraine's Anhelina Kalinina hits a return against Czech Republic's Petra Kvitova during their women's singles match on day three of the Australian Open tennis tournament in Melbourne on January 18, 2023. (Photo by WILLIAM WEST / AFP) / -- IMAGE RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE --

Czech Republic's Petra Kvitova hits a return against Ukraine's Anhelina Kalinina during their women's singles match on day three of the Australian Open tennis tournament in Melbourne on January 18, 2023. (Photo by WILLIAM WEST / AFP) / -- IMAGE RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE --

Czech Republic's Petra Kvitova reacts after a point against Ukraine's Anhelina Kalinina during their women's singles match on day three of the Australian Open tennis tournament in Melbourne on January 18, 2023. (Photo by WILLIAM WEST / AFP) / -- IMAGE RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE --

Czech Republic's Petra Kvitova hits a return against Ukraine's Anhelina Kalinina during their women's singles match on day three of the Australian Open tennis tournament in Melbourne on January 18, 2023. (Photo by WILLIAM WEST / AFP) / -- IMAGE RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE --

Czech Republic's Petra Kvitova serves against Ukraine's Anhelina Kalinina during their women's singles match on day three of the Australian Open tennis tournament in Melbourne on January 18, 2023. (Photo by WILLIAM WEST / AFP) / -- IMAGE RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE --

Ukraine's Anhelina Kalinina hits a return against Czech Republic's Petra Kvitova during their women's singles match on day three of the Australian Open tennis tournament in Melbourne on January 18, 2023. (Photo by WILLIAM WEST / AFP) / -- IMAGE RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE --

Ukraine's Anhelina Kalinina hits a return against Czech Republic's Petra Kvitova during their women's singles match on day three of the Australian Open tennis tournament in Melbourne on January 18, 2023. (Photo by WILLIAM WEST / AFP) / -- IMAGE RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE --

Ukraine's Anhelina Kalinina hits a return against Czech Republic's Petra Kvitova during their women's singles match on day three of the Australian Open tennis tournament in Melbourne on January 18, 2023. (Photo by WILLIAM WEST / AFP) / -- IMAGE RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE --

Ukraine's Anhelina Kalinina hits a return against Czech Republic's Petra Kvitova during their women's singles match on day three of the Australian Open tennis tournament in Melbourne on January 18, 2023. (Photo by WILLIAM WEST / AFP) / -- IMAGE RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE --

Czech Republic's Petra Kvitova hits a return against Ukraine's Anhelina Kalinina during their women's singles match on day three of the Australian Open tennis tournament in Melbourne on January 18, 2023. (Photo by WILLIAM WEST / AFP) / -- IMAGE RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE --

Czech Republic's Petra Kvitova hits a return against Ukraine's Anhelina Kalinina during their women's singles match on day three of the Australian Open tennis tournament in Melbourne on January 18, 2023. (Photo by WILLIAM WEST / AFP) / -- IMAGE RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE --

Ukraine's Anhelina Kalinina drinks during a break in her women's singles match against Czech Republic's Petra Kvitova on day three of the Australian Open tennis tournament in Melbourne on January 18, 2023. (Photo by WILLIAM WEST / AFP) / -- IMAGE RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE --

Czech Republic's Petra Kvitova hits a return against Ukraine's Anhelina Kalinina during their women's singles match on day three of the Australian Open tennis tournament in Melbourne on January 18, 2023. (Photo by WILLIAM WEST / AFP) / -- IMAGE RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE --

Czech Republic's Petra Kvitova hits a return against Ukraine's Anhelina Kalinina during their women's singles match on day three of the Australian Open tennis tournament in Melbourne on January 18, 2023. (Photo by WILLIAM WEST / AFP) / -- IMAGE RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE --

Czech Republic's Petra Kvitova reacts after a point against Ukraine's Anhelina Kalinina during their women's singles match on day three of the Australian Open tennis tournament in Melbourne on January 18, 2023. (Photo by WILLIAM WEST / AFP) / -- IMAGE RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE --

Czech Republic's Petra Kvitova serves against Ukraine's Anhelina Kalinina during their women's singles match on day three of the Australian Open tennis tournament in Melbourne on January 18, 2023. (Photo by WILLIAM WEST / AFP) / -- IMAGE RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE --

Czech Republic's Petra Kvitova reacts after a point against Ukraine's Anhelina Kalinina during their women's singles match on day three of the Australian Open tennis tournament in Melbourne on January 18, 2023. (Photo by WILLIAM WEST / AFP) / -- IMAGE RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE --

Czech Republic's Petra Kvitova reacts after a point against Ukraine's Anhelina Kalinina during their women's singles match on day three of the Australian Open tennis tournament in Melbourne on January 18, 2023. (Photo by WILLIAM WEST / AFP) / -- IMAGE RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE --

A man holds a Ukrainian flag during the women's singles match between Czech Republic's Petra Kvitova and Ukraine's Anhelina Kalinina on day three of the Australian Open tennis tournament in Melbourne on January 18, 2023. (Photo by WILLIAM WEST / AFP) / -- IMAGE RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE --

Ukraine's Anhelina Kalinina hits a return against Czech Republic's Petra Kvitova during their women's singles match on day three of the Australian Open tennis tournament in Melbourne on January 18, 2023. (Photo by WILLIAM WEST / AFP) / -- IMAGE RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE --

Ukraine's Anhelina Kalinina (L) shakes hands with Czech Republic's Petra Kvitova after victory during their women's singles match on day three of the Australian Open tennis tournament in Melbourne on January 18, 2023. (Photo by WILLIAM WEST / AFP) / -- IMAGE RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE --

Ukraine's Anhelina Kalinina reacts after victory against Czech Republic's Petra Kvitova during their women's singles match on day three of the Australian Open tennis tournament in Melbourne on January 18, 2023. (Photo by WILLIAM WEST / AFP) / -- IMAGE RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE --

Ukraine's Anhelina Kalinina celebrates after victory against Czech Republic's Petra Kvitova during their women's singles match on day three of the Australian Open tennis tournament in Melbourne on January 18, 2023. (Photo by WILLIAM WEST / AFP) / -- IMAGE RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE --

Ukraine's Anhelina Kalinina celebrates after victory against Czech Republic's Petra Kvitova during their women's singles match on day three of the Australian Open tennis tournament in Melbourne on January 18, 2023. (Photo by WILLIAM WEST / AFP) / -- IMAGE RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE --

Ukraine's Anhelina Kalinina celebrates after victory against Czech Republic's Petra Kvitova during their women's singles match on day three of the Australian Open tennis tournament in Melbourne on January 18, 2023. (Photo by WILLIAM WEST / AFP) / -- IMAGE RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE --

Ukraine's Anhelina Kalinina celebrates after victory against Czech Republic's Petra Kvitova during their women's singles match on day three of the Australian Open tennis tournament in Melbourne on January 18, 2023. (Photo by WILLIAM WEST / AFP) / -- IMAGE RESTRICTED TO EDITORIAL USE - STRICTLY NO COMMERCIAL USE --