Jannik Sinner Ends 2026 Season With Knee Inflammation, Will Miss ATP Finals

Jannik Sinner's 2026 season is over. The Italian will undergo treatment for inflammation in his knee and will miss the ATP Finals in Turin, where he had triumphed in the last two editions, Tennis Majors reported on Tuesday.

"I need to think about my long-term career," Sinner said, promising to come back at a hundred percent. The decision closes a campaign that carried enormous expectation, and it leaves the year-end showpiece — staged on home soil — without its defending champion and biggest draw.

Italian media had already flagged the knee problem as a serious concern, with one newspaper suggesting a probable return only in 2027. For Sinner, the call is a familiar calculation elite athletes are forced to make: sacrifice the season's glittering finale to protect the years ahead. The ATP Finals in Turin will now crown a new champion, and the offseason storyline has already written itself — whether Sinner returns at full power when the new season begins.