The U.S. Open's third round continues on Saturday with world number three Coco Gauff hoping that her misfiring serve does not cause her further headaches, while Jannik Sinner and Naomi Osaka will be aiming to continue their run of straight-set wins.

TOP WOMEN'S MATCH: MAGDALENA FRECH V COCO GAUFF

Coco Gauff's mental battle to master her new serve continued in the second round against Donna Vekic as the American was reduced to tears after failing to hold her serve due to a flurry of errors.

The 2023 champion, who produced seven double faults in the first set but only one in the second, rallied to secure victory and progress to the third round.

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