Naomi Osaka of Japan returns the ball to Karolina Muchova of the Czech Republic during their match at the Madrid Open tennis tournament in Madrid, Spain, Sunday, May 2, 2021. (AP Photo/Paul White)

FILE - Naomi Osaka, of Japan, reacts during her match against Karolina Muchova, of the Czech Republic, at Madrid Open tennis tournament in Madrid, Spain, May 2, 2021. Naomi Osaka and Simone Biles were not the first elite athletes to struggle with their own mental health, but their public admissions this year spotlighted a crisis not often addressed in the sporting world. (AP Photo/Paul White, File)