FILE - In this July 13, 2019, file photo, Romania's Simona Halep holds the trophy after defeating Serena Williams in the women's singles final match on day twelve of the Wimbledon Tennis Championships in London. Halep says she will skip the U.S. Open. She says she wants to put her health first and prefers to stay in Europe amid the coronavirus pandemic. (AP Photo/Ben Curtis, File)

FILE - In this Aug. 29, 2019, file photo, Simona Halep, of Romania, returns a shot to Taylor Townsend during the second round of the U.S. Open tennis championships in New York. Halep says she will skip the U.S. Open. She says she wants to put her health first and prefers to stay in Europe amid the coronavirus pandemic. (AP Photo/Kevin Hagen, File)

FILE - In this Feb. 22, 2020, file photo, Romania's Simona Halep returns the ball to Kazakhstan's Elena Rybakina during the final match of the Dubai Duty Free Tennis Championship in Dubai, United Arab Emirates. Halep says she will skip the U.S. Open. She says she wants to put her health first and prefers to stay in Europe amid the coronavirus pandemic. (AP Photo/Kamran Jebreili, File)