Published on, Aug. 26 -- August 26, 2025 12:16 AM

Defending U.S. 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.

Sabalenka was among the marquee names on the opening day's schedule and the Belarusian fed off the vocal Arthur Ashe crowd to overcome determined Swiss Rebeka Masarova 7-5 6-1 and move into the next round....