Jannik Sinner Withdraws From Cincinnati With Knee Injury

What happened: Jannik Sinner has withdrawn from the Cincinnati Open because of a right knee injury, The Guardian reported on Sunday. The world No. 1 said in a statement posted on the ATP website that, after consulting doctors and his team, he had to pull out of the Masters 1000 event because he is “not ready to compete yet.”

Watch the highlights:

Why it matters: Cincinnati is not just another stop on the calendar. As a Masters 1000 event, it is one of the key hard-court tournaments before the US Open, which begins on August 30. Sinner’s withdrawal removes the top-ranked player from a major preparation week and introduces a fitness question into the final stretch before the last Grand Slam of the season.

Tournament impact: The immediate effect is on the Cincinnati draw, where Sinner’s absence changes the competitive shape of the event. The source does not provide replacement details, draw adjustments, or seed movement, so those should not be assumed. What can be said is that the tournament loses its world No. 1 and one of its central title references before play reaches its full competitive arc.

US Open angle: The bigger consequence is the calendar pressure. Sinner’s own wording is important: he said the knee has been bothering him and that he and his medical team have been working hard, but he has to accept he is not ready yet. That does not confirm he will miss the US Open. It does confirm that his preparation has been interrupted close to the tournament.

What to watch: The key follow-up is whether Sinner returns to full training quickly enough to build match sharpness before August 30. Fitness and readiness are separate questions. A player can be cleared to play but still lack the rhythm that comes from competitive matches. Cincinnati would have offered that hard-court testing environment; now the lead-in becomes more uncertain.

Confidence: Confirmed by The Guardian: Sinner withdrew from the Cincinnati Open with a right knee injury, said he was not ready to compete, and is trying to stay fit for the US Open. Still needing follow-up: the severity of the knee issue, his recovery timeline, and whether his US Open participation or seeding path is affected.