Tennis star Novak Djokovic, 37, is to undergo knee surgery due to the injury that forced him to withdraw from the quarterfinals of the French Open against Casper Ruud, according to L'Equipe.
This could put Djokovic's participation in Wimbledon at risk.
According to L'Equipe, the Serbian world number one has a meniscal injury.
Wimbledon, the classic grass tournament, starts on July 1.
