Two-time major champion and current world No. 3 Coco Gauff has fired her coach Matthew Daly, just days before the start of the 2025 US Open.

Gauff will continue to work with longtime coach Jean-Christophe "J.C." Faurel and has also brought in Gavin MacMillan, a biomechanics specialist, a source confirmed to ESPN. She was seen alongside both during her practice session Wednesday in New York.

MacMillan previously worked with world No. 1 Aryna Sabalenka and she has credited him for helping her with her serve, after she famously struggled with the yips in 2022, and with improving her forehand. Gauff has had issues with her serve this summer and had 42 double faults during her three matches at the Canadian Open earlier this month.

Daly has yet to respond to ESPN's request for comment, bu

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