Women's tennis

FILE - In this Monday, March 11, 2019, file photo, Novak Djokovic, of Serbia, walks off the court during a rain break in his match against Philipp Kohlschreiber, of Germany, at the BNP Paribas Open tennis tournament in Indian Wells, Calif. The BNP Paribas Open tennis tournament, set to begin Wednesday, March 11, 2020, has been postponed after a case of coronavirus was confirmed in the Coachella Valley. (AP Photo/Mark J. Terrill, File)

FILE - In this Nov. 13, 2019, file photo, Rafael Nadal, of Spain, uses a towel after he plays a point against Daniil Medvedev, of Russia, during their ATP World Tour singles tennis match at O2 Arena in London. Tennis players at the BNP Paribas Open that starts next week will have to manage their own towels on court and ball kids will wear gloves while working matches at the combined men's and women's tournament in the Southern California desert. The measures were announced Friday, March 6, 2020, by tournament organizers, who are offering fans uneasy about the coronavirus a refund for this year's event or a credit for next year. (AP Photo/Kirsty Wigglesworth, File)

FILE - In this Jule 7, 2014, file photo, Russia's Maria Sharapova reacts after defeating Romania's Simona Halep during their final match of the French Open tennis tournament at the Roland Garros stadium, in Paris, France. Sharapova is retiring from professional tennis at the age of 32 after five Grand Slam titles and time ranked No. 1. She has been dealing with shoulder problems for years. In an essay written for Vanity Fair and Vogue about her decision to walk away from the sport, posted online Wednesday, Feb. 26, 2020, Sharapova asks: “How do you leave behind the only life you’ve ever known?” (AP Photo/David Vincent, File)

United States' Bethanie Mattek-Sands leaps toward Sofia Kenin after they defeated Latvia's Jelena Ostapenko and Anastasija Sevastova during the doubles match in a Fed Cup tennis qualifying tie to advance the U.S. team Saturday, Feb. 8, 2020, in Everett, Wash. (AP Photo/Elaine Thompson)

United States' Serena Williams, right, talks with coach Kathy Rinaldi during a Fed Cup qualifying tennis match against Latvia's Jelena Ostapenko on Friday, Feb. 7, 2020, in Everett, Wash. (AP Photo/Elaine Thompson)

Serbia's Novak Djokovic kisses his trophy, the Norman Brookes Challenge Cup, during a photo shoot at Melbourne's Royal Botanic Gardens following his win over Austria's Dominic Thiem in the men's singles final at the Australian Open tennis championships, in Melbourne, Australia, Monday, Feb. 3, 2020. (AP Photo/Dita Alangkara)

Sofia Kenin of the U.S. holds the Daphne Akhurst Memorial Cup aloft after defeating Spain's Garbine Muguruza in the women's singles final at the Australian Open tennis championship in Melbourne, Australia, Saturday, Feb. 1, 2020. (AP Photo/Dita Alangkara)

Barbora Krejcikova, left, of the Czech Republic and Croatia's Nikola Mektic talk during their match against Bethanie Mattek-Sands of the U.S. and partner Britain's Jamie Murray in the mixed doubles final at the Australian Open tennis championship in Melbourne, Australia, Saturday, Feb. 1, 2020. (AP Photo/Lee Jin-man)

Austria's Dominic Thiem sits on the court after a fall during his semifinal against Germany's Alexander Zverev at the Australian Open tennis championship in Melbourne, Australia, Friday, Jan. 31, 2020. (AP Photo/Lee Jin-man)

Romania's Simona Halep reacts during her semifinal loss to Spain's Garbine Muguruza at the Australian Open tennis championship in Melbourne, Australia, Thursday, Jan. 30, 2020. (AP Photo/Andy Wong)