1 / 14In this Jan. 30, 2019, file photo, Maria Sharapova of Russia attends a meeting with her fans at the St. Petersburg Ladies Trophy-2019 tennis tournament match in St.Petersburg, Russia. She has been dealing with shoulder problems for years. (AP Photo/Dmitri Lovetsky, File)
2 / 14In this Sept. 9, 2006, file photo, Maria Sharapova kisses the women's singles championship trophy at the US Open tennis tournament in New York. (AP Photo/Richard Drew, File)
3 / 14In this Jule 7, 2014, file photo, Russia's 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. (AP Photo/David Vincent, File)
4 / 14In this July 1, 2004, file photo, Sharapova reacts after defeating Lindsay Davenport in their Women's Singles semi-final match on the Centre Court at Wimbledon. (AP Photo/Anja Niedringhaus, File)
5 / 14In this July 3, 2004, file photo, Sharapova holds the winner's trophy after defeating Serena Williams in the Women's Singles final match on the Centre Court at Wimbledon. (AP Photo/Anja Niedringhaus, File)
6 / 14In this Sept. 16, 2017, file photo, Sharapova arrives at the Los Angeles premiere of "Battle of the Sexes" in Los Angeles. (Photo by Jordan Strauss/Invision/AP, File)
7 / 14In this Aug. 22, 2006, file photo, tennis star Sharapova poses with her new TAG Heuer watch outside Bloomingdale's in New York. (AP Photo/Diane Bondareff, File)
8 / 14In this Jan. 20, 2008, file photo, Sharapova of Russia serves the ball to her compatriot Elena Dementieva during their fourth-round women's singles match at the Australian Open tennis championships in Melbourne, Australia. (AP Photo/Andrew Brownbill, File)
9 / 14In this June 25, 2004, file photo, Sharapova blows a kiss to the crowd after defeating Daniela Hantuchova in their Women's Singles third round match on the Centre Court at Wimbledon. (AP Photo/Anja Niedringhaus, File)
10 / 14In this Sept. 10, 2006, file photo, Sharapova, the US Open tennis women's singles champion, poses with her trophy in New York. (AP Photo/Osamu Honda, File)
11 / 14In this Sept. 9, 2006, file photo, Sharapova looks up to the crowd after winning the women's singles championship over Justin Henin-Hardenne of Belgium at the US Open tennis tournament in New York. (AP Photo/Elise Amendola, File)
12 / 14In this June 28, 2003, file photo, Sharapova blows a kiss to the crowd after deafeating Yugoslavia's Jelena Dokic, in their Women's Singles third round match at Wimbledon. (AP Photo/Dave Caulkin, File)
13 / 14In this June 9, 2012, file photo, Maria Sharapova of Russia holds the trophy after winning the women's final match against Sara Errani of Italy at the French Open tennis tournament at Roland Garros stadium in Paris. (AP Photo/Bernat Armangue, File)
14 / 14In this Monday, March 7, 2016, file photo, tennis star Sharapova speakings during a news conference in Los Angeles. (AP Photo/Damian Dovarganes, File)
