The new U.S. Open mixed doubles tournament drew plenty of criticism for everything from its format to its field. With mostly singles players, some who rarely play doubles at all, and an unusual scoring system,

The thought of the top men’s and women’s singles players teaming up is one that has often intrigued tennis fans around the world.

The new Mixed Doubles format for the 2025 US Open has allowed more of the top singles players to participate in the event, and on Tuesday, Aug. 19 in New York, the Mixed Doubles tournament begins.

The No. 1-ranked Sinner, the defending champion in singles at Flushing Meadows, was supposed to compete in mixed doubles with Katerina Siniakova.

Jannik Sinner has withdrawn from the U.S. Open mixed doubles event, where he was going to partner Katerina Siniakova, a day after illness forced the world number one to retire five games into his Cincinnati Open final.