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.

The winners of the men's and women's singles titles at the US Open tennis tournament will each receive $5 million, up from $3.6 million in 2024.

Grand Slam singles champions such as Jannik Sinner, Carlos Alcaraz, Iga Swiatek and Madison Keys will be playing for a little extra money — OK, a lot of extra money, by any standard: $1 million to the winning duo — and trying to get their hands on a trophy in the U.S. Open’s overhauled mixed doubles tournament.

When it came to finding a partner for the newly formatted mixed doubles event at this year’s U.S. Open, it seemed like a no-brainer for Madison Keys.

Emma Navarro withdrew from the mixed doubles championship at the U.S. Open, but Katerina Siniakova will replace her and partner with Jannik Sinner.