The top-ranked tennis player in the world, Jannik Sinner, is set to miss the remainder of the 2026 season due to a persistent issue with his right knee.
The Italian athlete has been sidelined from competitive matchplay since successfully retaining his crown at Wimbledon back in July.
Sinner, who has claimed five Grand Slam titles, explained that his choice to cut his campaign short was motivated by a need to prioritize his future in the sport.
“In consultation with my medical team, we have determined that undergoing a specific therapy plan for my knee is necessary,” the 25-year-old shared via a video posted on Instagram.
“The previous seasons brought me an incredible amount of joy and unforgettable moments, making this year’s turn of events particularly difficult to accept.
“I am committed to putting in all the required effort to return to full fitness.”
For the majority of the season, Sinner ruled the courts, racking up 44 victories while suffering only three losses in singles play.
He secured five consecutive Masters 1000 trophies from March to May, establishing himself as the youngest male player to ever achieve the ‘career Golden Masters’ milestone.
As a result of Sinner’s physical setback, Alexander Zverev is now poised to overtake him and claim the year-end world number one ranking.
The current world number two, Zverev, who captured both the French Open and US Open titles this season, is presently 1,280 points behind Sinner in the live standings.
Nevertheless, Sinner is now prevented from defending the substantial ranking points he amassed during late-season victories last year in China, Vienna, Paris, and at the ATP Finals.
Over the course of 2026, Sinner captured six championships across clay, grass, and hard courts, suffering a solitary singles defeat from March through July.
While he advanced to the semi-final stage of the Australian Open before falling to Novak Djokovic in a five-set battle, he endured an unexpected second-round defeat at Roland Garros in May.
That defeat to Juan Manuel Cerundolo, played in the sweltering and muggy Parisian weather, brought an end to Sinner’s impressive 30-match unbeaten run.
Nonetheless, he responded magnificently at Wimbledon, where he overcame a grueling five-set opener—during which his feet were bleeding in his footwear—to ultimately defeat Zverev in the final and retain his crown.
Despite going head-to-head in three out of the four Major finals the previous year, Sinner and his primary rival Carlos Alcaraz crossed paths just a single time in 2026.
Sinner emerged victorious in that encounter, defeating the Spaniard in the Monte Carlo Masters final to reclaim the top spot in the world rankings.
He concludes his season with a formidable 10-1 record against top-10 opponents, with his only loss of that kind occurring against Djokovic in Melbourne in January.
