Sinner had to forfeit his Cincinnati Open singles final against Carlos Alcaraz after five games due to illness.

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.

The scheduling of the Cincinnati Open final on Monday has caused chaos ahead of the start of the new-look US Open mixed doubles event

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

World number one Jannik Sinner, who was forced to retire during the final of the Cincinnati Open, and playing partner Katerina Siniakova have withdrawn from the US Open mixed doubles draw, tournament organisers confirmed Tuesday.

Jannik Sinner has withdrawn from the U.S. Open mixed doubles event, where he was going to partner Katerina Siniakova, a day after illness forced the world number one to retire five games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