Jannik Sinner ends 2026 season over knee injury, ceding world No. 1 ranking

Medical decision and early season conclusion

Jannik Sinner has officially concluded his 2026 tennis season after deciding to undergo specialized medical treatment for persistent knee inflammation. The world No. 1 announced the development on Tuesday, 6 October 2026, through a video published across his social media accounts. Sinner had not competed since July, when he took part in his final tournament appearance before taking time off court. According to an official statement released by his management team, doctors advised that initiating therapy immediately is essential to give the Italian athlete sufficient time to heal. By ending his competitive schedule in October, Sinner aims to complete a full recovery cycle before launching his physical preparation for the 2027 tennis season.

Sinner addressed his supporters directly in the video message, outlining the reasons behind halting competition for the rest of the year.

Together with the doctors, I decided to undergo a cycle of treatment for my knee. This means that the 2026 season is officially over. The last two years, and in particular the finale in Turin, gave me wonderful emotions and feelings. This year will be very different, but at the moment I also have to think about my long-term career, so I will do everything possible to return to 100% fitness.

Absence from Beijing, Shanghai, and Turin

The early closure of Sinner's season follows a sequence of tournament withdrawals during the autumn calendar. Sinner had already forfeited scheduled appearances at Asian hard-court events in Beijing and Shanghai due to his knee issues. The confirmation of his medical break rules him out of the year-ending ATP Finals in Turin, an event where he featured prominently over the previous two years. Sinner expressed regret at missing the Italian showcase, noting that the past two editions in Turin provided memorable moments in his career. His medical team determined that attempting to play through the joint inflammation during the indoor season would risk aggravating the knee condition.

Impact on ATP world rankings

Sinner's prolonged absence from the ATP Tour carries immediate consequences for the world rankings. Because the Italian will forfeit all ranking points from the remaining tournaments on the 2026 calendar, he will concede the world No. 1 ranking. German player Sascha Zverev is positioned to take over the top spot in the ATP rankings across the coming weeks. Sinner had held the No. 1 ranking throughout the season, but his inability to compete in Beijing, Shanghai, and Turin leaves Zverev with an uncontested path to the top ranking position before the year concludes.

Rehabilitation plans and return in 2027

The management group confirmed that the immediate priority is an uninterrupted therapeutic cycle followed by targeted physical rehabilitation. The medical staff determined that beginning the knee therapy in October establishes a clear timeline for Sinner to regain complete fitness without rushing back to the tour. Sinner stated that his primary objective is returning at 100% of his physical capabilities rather than risking long-term damage to his professional career. He concluded his announcement by thanking his fan base for their ongoing support and confirming that his return to competitive tennis will take place at the start of the 2027 season.