British number one Katie Boulter found her rhythm to fight back and win her US Open first-round match against Belarusian qualifier Aliaksandra Sasnovich.
Boulter, who is seeded 31st, came through to win 5-7 6-2 6-1 in New York on Tuesday.
An edgy start saw the 28-year-old Briton lose serve three times in the opening set before settling down to take control.
"It's not easy coming out here to play your first round against someone who has been top 30 - she knows how to play tennis," Boulter, who reached the third round last year, told Sky Sports.