The second semifinal between defending champions Sara Errani/Andrea Vavassori and the all-American, last-minute alternate pairing of Danielle Collins/Christian Harrison is underway, as they bid to join Świątek/Ruud in the mixed doubles finale.

Poland's Iga Swiatek and Norway's Casper Ruud, two points away from a defeat, rallied to win the final six points and beat the United States' Jessica Pegula and Great Britain's Jack Draper 3-5, 5-3, 10-8 in the U.

This article was originally published on www.si.com as Iga Świątek, Casper Ruud Made Wild Comeback to Reach U.S. Open Mixed Doubles Final. Iga Świątek, and now her mixed doubles partner Casper Ruud, refuse to lose.