NEW YORK: Defending US Open champion Aryna Sabalenka was given an early test before she moved into the second round while Emma Raducanu won her first match at the Grand Slam since her 2021 triumph as the tournament began a day earlier than usual on Sunday. Under the new extended 15-day format, first-round singles action will be contested from Sunday to Tuesday, rather than two days as in previous years, spreading out the star attractions and allowing access for another 70,000-odd spectators.

The best matches on the first day of the 2025 U.S. Open, including last year's singles finalists and one defending champion.

The fourth and final grand slam of the year begins with former champion Emma Raducanu among the first on court. Join Taha Hashim for updates