Sinner retired with apparent illness in the first set of Monday's Cincinnati Open final against Alcaraz after digging a 5-0 deficit. Sinner remained on the court for the trophy ceremony and addressed his condition while speaking with the crowd. He didn't offer specifics, but said that he "didn't feel great."

An illness caused top-ranked men's player Jannik Sinner to retire from the Cincinnati Open final against his rival Carlos Alcaraz on Monday after just 23 minutes of tennis. He was expected to then travel to New York and play alongside 11-time Grand Slam doubles champion Katerina Siniakova - most recently in the 2025 Wimbledon mixed doubles - in the first round of the new-look 2025 U.

Sinner outplayed the seven-time champion Novak Djokovic in straight sets and arranged his first Wimbledon title clash against Alcaraz. The Spaniard took the opener, but the Italian kept his composure and provided a 4-6, 6-4, 6-4, 6-4 victory in three hours and four minutes.

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

How to watch Jannik Sinner's first match back after defeating Carlos Alcaraz in the Wimbledon final last month.

Sinner admitted he got lucky in that match. World no. 1 took it as a sign and raised his level ahead of his next duel. The outcome? Convincing victories over Ben Shelton, Novak Djokovic and Carlos Alcaraz en route to his maiden Wimbledon trophy.

Overview Jannik Sinner is set to return to action at the Cincinnati Open. He will look to defend his title. After winning Wimbledon, Sinner took a long break to recover and refresh. World number one and reigning Wimbledon champion Jannik Sinner is set to return to action at the Cincinnati Open,

How deep can Emma Raducanu and Jack Draper go? Who will win the mens and womens titles? Pundits including Martina Navratilova and Marion Bartoli preview tournament; The US Open is live on Sky Sports Tennis and Sky Sports+,