Tennis-Sinner withdraws from US Open mixed doubles competition

FILE PHOTO: Aug 18, 2025; Cincinnati, OH, USA; Jannik Sinner (ITA) returns a shot against Carlos Alcaraz (ESP) during the Cincinnati Open at the Lindner Family Tennis Center. Mandatory Credit: Aaron Doster-Imagn Images/File Photo

(Reuters) -Jannik Sinner has withdrawn from the U.S. Open mixed doubles event, where he was going to partner Katerina Siniakova, a day after illness forced the world number one to retire five games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

Sinner, the reigning Australian Open, Wimbledon and U.S. Open champion, looked uncomfortable in sweltering conditions on Monday at Cincinnati where he retired after falling behind 5-0 to Carlos Alcaraz in the first set.