Jannik Sinner ends 2026 tennis season after confirming major decision on knee injury

World No. 1 Jannik Sinner has confirmed he is ending his 2026 tennis season early due to a knee injury, withdrawing from the Shanghai Masters and the Nitto ATP Finals. The decision was announced on October 6, 2026, and Sinner is set to undergo a procedure related to the knee issue. His absence could result in him losing his top ranking before he returns to the court.