Jannik Sinner out of Cincinnati Open with knee injury as US Open looms

World No. 1 tennis player Jannik Sinner has withdrawn from the Cincinnati Open due to a right knee injury, as announced on August 9, 2026. Sinner made the decision after consulting with his doctors and team, releasing a statement through the tournament. The withdrawal comes just weeks before the US Open, raising concerns about his readiness for the year's final Grand Slam.