Gauff changes coaching ahead of US Open

Coco Gauff changes her coaching team by hiring Gavin MacMillan after parting with Matt Daly, days before the 2025 US Open.

Gauff parts ways with coach ahead of US Open

Coco Gauff has parted ways with coach Matt Daly and added Gavin MacMillan, a biomechanics expert who previously worked with Aryna Sabalenka. The move comes just before the 2025 US Open and follows a season where her serve has been inconsistent. Daly confirmed the split, while MacMillan was seen on court during a practice session at Arthur Ashe Stadium. Initial reports linked the change to Jean-Christophe Faurel, but ESPN later said Faurel remained on court with Gauff that day.

Gauff’s Cincinnati quarterfinal loss to Jasmine Paolini, marked by 62 unforced errors, has intensified questions about her serve. She won the French Open in May, and last year she parted ways with Brad Gilbert after a fourth‑round exit at the US Open. The coaching switch signals a shift toward a more data driven approach, using video analysis and biomechanics to fix technique.

The move reflects a broader trend in elite tennis toward science driven coaching. Biomechanics specialists map every motion, but they also bring the risk of changing a trusted voice on court. Swapping coaches so close to a major can disrupt rhythm and comfort that players build over months.

If the new team helps stabilize the serve and adds consistency, the payoff could be a quick return to form at Flushing Meadows. The outcome will depend on how well communication lines stay open and whether Gauff accepts a different oncourt philosophy while maintaining her competitive edge.

Highlights

The coming weeks will show if a fresh voice can sharpen Gauff’s game without derailing her consistency.