Who won the men's singles title at the 2026 Cincinnati Open?

Arthur Fils won the men's singles title at the 2026 Cincinnati Open.

Fils defeated American Frances Tiafoe in the championship match, winning 6–3, 1–6, 6–0. The victory gave the French player his first ATP Masters 1000 title, making the result a major milestone in his career.

The Cincinnati Open is one of the most important hard-court tournaments before the US Open. On the men's calendar, it is classified as an ATP Tour Masters 1000 event, the highest regular tournament tier below the four Grand Slam tournaments. Fils entered the event as the No. 21 seed, while Tiafoe was seeded 17th.

The tournament was held at the Lindner Family Tennis Center in Mason, Ohio. Although it is commonly called the Cincinnati Open, the venue is in a northern suburb of Cincinnati rather than within the city itself. Fils's title was especially notable because he beat a higher-seeded finalist in a match decided in three sets.