PARIS — Novak Djokovic pulled out of the the French Open with an injured knee on Tuesday, an abrupt end to his title defense and to his current stay at No. 1 in the rankings.
''I am really sad to announce that I have to withdraw from #rolandgarros," Djokovic posted on social media. "I played with my heart and gave my all in yesterday's match and unfortunately, due to a medial meniscus tear in my right knee, my team and I had to make a tough decision after careful consideration and consultation.''
The tournament said the extent of the injury was found during an MRI exam Tuesday. Djokovic was hurt during a fourth-round victory against No. 23 Francisco Cerundolo on Monday that lasted five sets spread across more than 4 1/2 hours. It was his second consecutive five-setter, with his total time on court across the two exceeding 9 hours.
The 24-time Grand Slam champion was supposed to face No. 7 seed Casper Ruud, the runner-up each of the past two years at Roland Garros, in the quarterfinals on Wednesday. Instead, Ruud gets a walkover into the semifinals, where he will face No. 4 Alexander Zverev or No. 11 Alex de Minaur.
With Djokovic, the owner of three French Open titles, gone from the bracket, and Rafael Nadal — owner of a record 14 — eliminated in the first round, someone will be holding the French Open men's trophy for the first time on Sunday.
The group of remaining contenders includes No. 2 seed Jannik Sinner, a 22-year-old Italian who defeated No. 10 Grigor Dimitrov 6-2, 6-4, 7-6 (3) on Tuesday to get to the semifinals and now is assured of replacing Djokovic atop the ATP rankings next week.
Sinner won the Australian Open in January and becomes the first man from his country to reach No. 1.
His match against Dimitrov was in progress when news of Djokovic's withdrawal spread. So Sinner had no idea until he was asked about it during an on-court interview after his win.