US Open 2025: World No.1 Jannik Sinner withdraws from mixed doubles – Here's why

World number one tennis player Jannik Sinner and his partner Katerina Siniakova have withdrawn from the US Open mixed doubles championship after Sinner was forced to retire due to illness during the Cincinnati Open final against Carlos Alcaraz on Monday, tournament organizers confirmed on Tuesday in New York.The 24-year-old Sinner had to concede the Cincinnati final to Alcaraz after falling behind 5-0 in the first set due to an illness that began the day before the match.

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"I'm disappointed, I didn't feel great from yesterday," Sinner said on court. "During the night, I thought I would recover a bit better, but it was not the case."Following his withdrawal from the Cincinnati final, Sinner did not attend the post-match press conference but issued a statement confirming his participation in the US Open singles tournament, which begins on Sunday.
"I love Grand Slams a lot, they are the main tournaments for, for my season and my career," said Sinner, the reigning US Open champion. "The US Open is going to be a tough tournament, but in the same time, I'm looking forward to it if I'm ready, physically and mentally."

The mixed doubles event, scheduled for Tuesday and Wednesday, features a new shortened format designed to bring together the world's top singles players.

Sinner's statement did not address his participation in the mixed doubles competition, leading to speculation about his ability to compete.Tournament organizers announced that American duo Danielle Collins and Christian Harrison will replace Sinner and Siniakova in the draw. They will face Switzerland's Belinda Bencic and Germany's Alexander Zverev in the opening round.