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,

Defending champion Aryna Sabalenka moved into the second round of the U.S. Open after weathering a challenging first set in her first match.

Aryna Sabalenka began her US Open title defence in convincing fashion, needing just 81 minutes to overcome Rebeka Masarova on Arthur Ashe Stadium. The world number one, who has fallen in two Grand Slam finals this season,