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."

Carlos Alcaraz of Spain and Jannik Sinner of Italy during the Men's Singles Final match on day twelve of the Cincinnati Open 2025 at Lindner Family Tennis Center on August 18, 2025 in Mason, Ohio. The ATP Tour then released quotes from Sinner in which he spoke about the U.S. Open.

World No. 1 and defending US Open champion Jannik Sinner says he’s “not 100% yet" for the start of the tournament but expects to be ready “in a couple of days.” Sinner suffered from a virus at the Cincinnati Open that forced him to retire down 5-0 to rival Carlos Alcaraz in Monday’s final.

Sinner lasted just five games before retiring from the Cincinnati Open final against Carlos Alcaraz, with just a week to go before the start of the US Open

Sinner addresses his state after retiring in the Cincinnati final and withdrawing from the US Open mixed doubles.

Ahead of the US Open, Jannik Sinner revealed a past pact with his parents: he would quit tennis if he didn't crack the top 200 by age 23 or 24 due to financial constraints. Sinner recently withdrew from the Cincinnati Open final against Carlos Alcaraz due to illness,

Jannik Sinner recently withdrew from the Cincinnati final against Carlos Alcaraz due to a viral infection, raising concerns about his ability to defend his title at the US Open, but medical expert Steven Buchwald sees Sinner's withdrawal as a wise choice to ensure optimal recovery and performance for the upcoming tournament.

Jannik Sinner’s recovery from physical and psychological stress was outlined, easing doubts over his US Open participation after the Cincinnati setback.