World No. 1 Jannik Sinner has withdrawn from the 2026 US Open due to a right knee injury, ruling him out of the final Grand Slam tournament of the season.

The 24-year-old Italian confirmed his decision on Friday, saying he had been unable to recover sufficiently despite working with his team and medical staff.

Sinner said he had resumed training in Monte Carlo but realised that he still needed more time to recover from the knee problem.

“I’m obviously very sad and disappointed, as New York has a special place in my heart,” Sinner said, expressing his disappointment at missing the tournament.

The five-time Grand Slam champion has not played competitively since winning Wimbledon on July 12. His knee injury also forced him to withdraw from the Canadian Open and Cincinnati Open, two key hard-court tournaments ahead of the US Open.

Sinner won the US Open in 2024 before finishing runner-up to Carlos Alcaraz in last year’s final.

His withdrawal is a major blow to the tournament, particularly after Alcaraz confirmed on Thursday that he would return to competitive action at Flushing Meadows following a four-month absence caused by a right wrist injury.

Sinner has enjoyed an outstanding 2026 season, compiling a 44-3 record and winning six titles, including Indian Wells, Miami, Monte Carlo, Madrid, Rome and Wimbledon.

The 2026 US Open is scheduled to begin on Aug. 30 in New York.