The U.S. Open men's and women's singles competitions kicked off Sunday at the USTA Billie Jean King National Tennis Center in New York City, marking the start of the final Grand Slam of the year as Jannik Sinner and Aryna Sabalenka look to defend their titles.

The US Open broke records in 2024 by offering the largest purse in tennis history. The final Grand Slam tournament of 2025 is upping the ante this year. The 2025 US Open will be the first tennis event to reach $90 million in total player compensation,

Jannik Sinner has received a brutal reality check as he prepares to defend his title at the US Open. The world No. 1 recently lifted his fourth Grand Slam trophy at Wimbledon, beating Carlos Alcaraz in the final. If he can retain his crown in Flushing Meadows, he’ll tie Alcaraz on five Majors.

Defending US Open champion Jannik Sinner faces a two-front battle in New York — fitness concerns and the relentless Carlos Alcaraz. With their rivalry heating up, Sinner's title defence could hinge on his recovery as much as his tennis.

Here are the latest odds from FanDuel Sportsbook on who will win the 2025 U.S. Open men's and women's singles titles