NEW YORK :Coco Gauff shook off the nerves that had rattled her during her opening two matches at the U.S. Open as she cruised into the fourth round on Saturday, while men's 10th seed Lorenzo Musetti advanced after compatriot Flavio Cobolli retired injured.

Gauff struggled with errors and double faults in her first two rounds at Flushing Meadows but the American third seed hit her stride in the early match on Arthur Ashe Stadium on Saturday, where she subdued the Polish 28th seed Magdalena Frech 6-3 6-1.

"It's been an emotional week," said Gauff, who showed solid improvement in her serve with four double faults compared to 18 across her first two matches.

"Today showed I was really having fun out there."

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