Questions about Jannik Sinner’s fitness arose after he retired during the final of the Cincinnati Open against Carlos Alcaraz towards the end of the first set. The concerns intensified when Sinner sub

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.

Jannik Sinner holds an 88-28 record at a Masters 1000 level, claiming four titles from eight finals. While trailing to Carlos Alcaraz in the number of shields on his CV, the Italian is a proud owner of one of the finest streaks at this level.

The tennis world collectively held its breath when Jannik Sinner, the Italian phenom and newly minted World No. 1, tapped out of the Cincinnati final. Seeing him retire against Carlos Alcaraz, trailing 0-5,

The world No. 1 aims to extend a 21-match win streak at hard-court majors—and renew his rivalry with Carlos Alcaraz—in Flushing Meadows.

Jannik's top rival will be Alcaraz once again, with the 22-year-old Spaniard expected to make a difficult debut against American giant Reilly Opelka. Behind them are Serbian veteran Novak Djokovic – who is chasing the 25th Major title of his endless career – Alexander Zverev, Daniil Medvedev, Jack Draper and Taylor Fritz (finalist here last year).

Tennis veteran Stan Wawrinka has made his feelings clear on Jannik Sinner's doping ban ahead of the 2025 US Open.