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

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.

Iga Swiatek and Carlos Alcaraz underlined their hard court credentials ahead of the US Open with victories over Jasmine Paolini and Jannik Sinner respectively in the women's and men's singles tournaments at the Cincinnati Open.

It felt like tennis had delivered the perfect script—world No. 1 Jannik Sinner versus world No. 2 Carlos Alcaraz in a Masters 1000 final. Both had torn through the draw in Cincinnati, barely breaking a sweat, setting up the dream clash fans had been waiting for.

The U.S. Open overhauled its mixed doubles tournament in hopes of drawing the top singles players. The defending champions don't intend to move out of the way so easily. Sara Errani and Andrea Vavassori earned the first win in the tournament,

Jannik Sinner’s preparations for the US Open ended in emotional scenes as he retired from the Cincinnati final after just five games and 23 minutes.

With the revamped US Open mixed doubles starting on Tuesday, BBC Sport looks at the positives and negatives of the controversial change.