Roger Federer pulled out of the French Open on Sunday, less than 12 hours after he pulled out a difficult and lengthy third-round victory.
The tournament announced the 20-time Grand Slam champion s withdrawal.
Federer said in a statement that it is important for him to listen to his body as he returns to action after two operations on his right knee.
The 39-year-old Federer was supposed to play against Matteo Berrettini in the fourth round on Monday.
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