The French Open is scheduled to begin Sunday in Paris. Osaka heads into the clay-court tournament ranked No. 2 in the world.
The 23-year-old Osaka, who was born in Japan and now is based in the United States, has won four Grand Slam titles. That includes last year's U.S. Open and the Australian Open this February.
"I've often felt that people have no regard for athletes mental health and this very true whenever I see a press conference or partake in one," wrote Osaka, who was selected as the AP Female Athlete of the Year in 2020. "We're often sat there and asked questions that we've been asked multiple times before or asked questions that bring doubt into our minds and I'm just not going to subject myself to people that doubt me."