Djokovic undergoes successful knee surgery

Novak Djokovic underwent surgery on his knee, the world number one said on Thursday, after he was forced to pull out of the French Open with an injury that could threaten his Wimbledon and Olympic chances.

The injury, sustained in his fourth-round win over Francisco Cerundolo, ended the Serb's quest to win a record-extending 25th Grand Slam trophy and will result in him losing his top ranking to Italian Jannik Sinner on Monday.

"In the past day, I had to make some tough decisions after sustaining a meniscus tear during my last match. I’m still processing it all but I am happy to update you that the surgery went well," Djokovic said in a post on Instagram.

"I am so appreciative of the team of doctors who have been by my side, as well as the overwhelming support I have received from my fans.

"I’m going to do my best to be healthy and fit to return to the court as soon as possible."