CANCUN, Mexico (AP) — Jessica Pegula outplayed US Open winner Coco Gauff and beat her 6-2, 6-1 at the WTA Finals on Saturday in a matchup between American doubles partners on a rainy and windy evening to reach the title match at the season-ending championship for the first time.

Their semifinal was tied at 2-all when the fifth-seeded Pegula, a 29-year-old American who is a decade older than Gauff, reeled off six games in a row to claim the opening set and lead 2-0 in the second.

This was the first time two U.S. women played each other in the final four at this event since 2002, when Serena Williams defeated Jennifer Capriati. When Saturday’s semifinal ended after an hour, Pegula and the third-seeded Gauff met at the net for a hug.