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.

US OPEN action is HERE – with the freshly revamped mixed doubles underway. Venus Williams is set to feature alongside Reilly Opalenka as one of the many big names in action today. Taylor

Emma Raducanu and Carlos Alcaraz crashed out of US Open mixed doubles vs Draper and Pegula, but a slightly awkward handshake between the Brits caught the eye.

Emma Raducanu and Carlos Alcaraz played their first mixed doubles match at the 2025 US Open. The pair, dubbed “Raducaraz,” lost to Jack Draper and Jessica Pegula. The match lasted 50 minutes. Alcaraz had arrived from Cincinnati after winning the singles.

The entire mixed doubles tournament will be played on the U.S. Open's stadium courts: Louis Armstrong Stadium and Arthur Ashe Stadium. Both the semifinal and final matches will take place under the lights on Wednesday at Arthur Ashe for an unparalleled tennis scene.

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World No. 1 Jannik Sinner is officially out of the U.S. Open Mixed Doubles tournament after falling ill in Cincinnati. The Italian retired down 5-0 against Carlos Alcaraz in the Cincinnati Open final on Monday and was due to play Mixed Doubles Tuesday with partner Kateřina Siniaková in New York.

In the U.S. Open, the format is being redesigned as a popularity contest engineered to generate buzz.