Gauff expands team before US Open

Coco Gauff changes her coaching setup by replacing one coach with a biomechanics specialist as she prepares for the US Open.

Gauff adds biomechanics expert after parting with coach before US Open

Coco Gauff has parted ways with her coach Matthew Daly just days before the US Open. Reports say Daly will no longer be part of her team, while longtime coach Jean-Christophe Faurel remains and Gavin MacMillan joins as a biomechanics specialist. Gauff was seen practicing in New York with the new setup this week.

MacMillan is known for working across sports and is praised for helping Aryna Sabalenka improve her serve. Gauff has faced serving issues recently, including 42 double faults in three Canadian Open matches. Under the Daly Faurel partnership, Gauff won last year’s WTA Finals and this year’s French Open, but she has struggled with form lately, including Wimbledon’s early exit to Dayana Yastremska. The singles tournament at the US Open starts on Sunday, with the draw taking place later on Thursday.

This move blends continuity with a new science focus. The idea is to address a core weapon, the serve, by bringing biomechanics expertise into a trusted coaching framework. If the serve improves, the changes could lift Gauff in big moments; if not, disruption to routine and chemistry could slow momentum. This reflects a broader trend in tennis where teams lean on data and movement science to gain an edge, even for players who already enjoy peak results. The question now is whether speed of adaptation matters as much as the quality of the change when the Open arrives.

Highlights

Time will tell how this blend of experience and science translates on the court.