Australia's Ajla Tomljanovic pushed world No 3 Coco Gauff to the brink in their first-round US Open match on Tuesday

Coco Gauff earned a hard-fought victory against Ajla Tomljanovic in her US Open debut. The match lasted three hours and ended with the American winning 6-4, 6-7 (2), 7-5. This was Gauff's return to the court, seeking to improve her serve—something that worked well at moments during the match.

Coco Gauff is moving on at the U.S. Open, but it was far from easy. The third-seeded American battled her way to a, 6-4, 6-7 (7), 7-5 win over Australia’s Ajla Tomljanovic at Arthur Ashe Stadium on Tuesday night. She had 10 double faults but broke Tomljanovic eight times, including late in the third set to avoid the upset.