Who did Jessica Pegula defeat in the 2026 Cincinnati Open semifinals?

Jessica Pegula defeated Iga Swiatek in the 2026 Cincinnati Open women’s singles semifinals. Pegula won 7–5, 4–6, 6–4 in a match that lasted nearly three hours.

Swiatek entered the semifinal as the defending Cincinnati champion and the No. 7 seed. Pegula, the No. 3 seed, recovered after losing the second set and secured a place in the final against fellow American Coco Gauff.

The victory ended Swiatek’s 10-match winning streak at the tournament. It also created the first all-American Cincinnati women’s singles final since 1970, when Rosie Casals defeated Nancy Richey.

Pegula did not win the title: Gauff defeated her in the final. That distinction matters because Pegula’s semifinal victory over the defending champion was one of the tournament’s defining results, while Gauff’s later win determined the champion.