World No. 1 Jannik Sinner powered into the semi-finals of the 2025 Cincinnati Open with a dominant victory over Félix Auger-Aliassime, producing a performance he described as one of his sharpest of the week.

At the Cincinnati Open, the spotlight has mostly been on the usual heavyweights—Jannik Sinner and Carlos Alcaraz both cruising past opponents with ease. But this year’s story has an unexpected twist, with a new name forcing his way into the conversation.

Sinner, who is competing in his first tournament since defeating two-time defending champion Carlos Alcaraz at Wimbledon last month, has yet to drop a set in Cincinnati. In the second round, Sinner breadsticked Daniel Galan 6-1, 6-1 before then defeating Gabriel Diallo in the Round of 32.

The Cincinnati Open organized surprise visits for fans from the game's biggest stars like Aryna Sabalenka and Jannik Sinner. Here's how they did it.

World number one Jannik Sinner reaches the Cincinnati Open quarter-finals with a 6-4 7-6 (7-4) victory over a stubborn Adrian Mannarino.

After cruising past Daniel Galan and Gabriel Diallo in Cincinnati, Jannik Sinner is now set to collide with French standout Adrian Mannarino in the Round of 16 today.

Unseeded Terence Atmane has stormed the semi-finals in Cincinnati, toppling some of the leading names on the ATP circuit.

Jannik Sinner enjoyed a relaxed day at the office in Cincinnati. The defending champion faced Felix Auger-Aliassime in the quarter-final and provided a one-sided 6-0, 6-2 victory in 71 minutes.

Jannik Sinner reached the quarterfinals at the Cincinnati Masters 1000, but had to work harder than expected to beat Adrian Mannarino in a match that was also conditioned by a long break due to rain.

ATP No. 1 Jannik Sinner and former Cincinnati Open champion Coco Gauff are in action Aug. 14. Follow live from Mason.