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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.

You can watch the first two rounds of the U.S. Open mixed doubles championship starting today at 11 a.m. ET on ESPN2 and from 1 p.m. ET on ESPNEWS. The action will also stream on ESPN+. The first two rounds of the U.S. Open mixed doubles championship will be played today, beginning at 11 a.m. ET.

World no.1 Jannik Sinner reportedly wanted to partner up with the legendary Serena Williams for the revamped U.S. Open mixed doubles tournament