The U.S. Open's largest court was packed for the final three matches of the reimagined mixed doubles tournament Wednesday night, which was made up of mainly top singles players for the first time.

Sara Errani (R) and Andrea Vavassori bite their championship trophy after defeating Iga Swiatek and Casper Ruud during the mixed doubles final during the 2025 U.S. Open Tennis Championship at the USTA Billie Jean King National Tennis Center in Flushing, N.Y., on August 20, 2025.

The event sparked controversy because it excluded traditional doubles teams - except for Errani and Vavassori - at the expense of big-name singles players. The star-studded field included world No. 2 Iga Swiatek and three-time Grand Slam singles finalist Casper Ruud, who lost in the final to the Italians, 6-3, 5-7, 10-6.

The new U.S. Open mixed doubles tournament has drawn plenty of criticism for everything from its format to its field.

The semifinals of the new-look U.S. Open mixed doubles championship are set, with the title being decided tomorrow. The teams of Iga Świątek/Casper Ruud and Sara Errani/Andrea Vavassori advanced in the early wave, and they will be joined by Danielle Collins/Christian Harrison and Jessica Pegula/Jack Draper.

The Italians had been determined to prove the value of doubles players and "made their points clear". But so did the US Open organisers. Their aim was to "create a bigger stage" for a format "deemed obsolete" and the interest it has subsequently generated is "undeniable".

Big names fell early and unexpected teams broke through to steal the spotlight on Day 1 of U.S. Open mixed doubles play, headlining an electric opener packed with upsets and standout performances.

Venus Williams served style on the court in a custom Khaite tennis kit for her opening mixed doubles match at the 2025 U.S. Open alongside American player Reilly Opelka on Tuesday in New York City.