The weeklong confrontation between Naomi Osaka, the second-ranked woman in tennis, and leaders of the sport’s four Grand Slam tournaments turned bitter Monday when Osaka withdrew from the French Open citing concerns for her mental health.

The move was a dramatic turn in the high-stakes standoff between the most powerful officials in tennis and Osaka. The 23-year-old is not only the world’s highest paid female athlete but a generational star who has quickly become the most magnetic figure in tennis.

"I think now the best thing for the tournament, the other players and my well-being is that I withdraw so that everyone can get back to focusing on the tennis going on in Paris,” Osaka said in an Instagram post.