American tennis player Coco Gauff has parted ways with her coaches Matt Daly and J.C. Faurel and brought on biomechanics expert Gavin MacMillan.

Prior to the start of the U.S. Open, Coco Gauff announces the firing of both her coaches amid a recent string of loses.

Gauff has not appeared confident with her serve since beating Aryna Sabalenka on clay earlier this summer. She won three matches in the US Open tuneup earlier at the Cincinnati Open, but lost to Italy's Jasmine Paolini in the fourth round.