Ahead of the Australian Open, Coco Gauff had nothing but praise for Matt Daly. She asserted , “Matt has helped me with the technical side of things — my serve, specifically, and other things, as well.” With Daly by her side, Gauff secured wins in Beijing, the WTA Finals, and the 2025 French Open. However, following a tenure of less than a year, she parted ways with the grip specialist. In his stead, she brought Gavin MacMillan on board. Yes, he’s the same biomechanics expert who helped Aryna Sabalenka overcome her weak serve. But why did Gauff make such a hasty decision?

Ahead of the US Open, during a press conference , a reporter asked about her decision to split with Daly and hire MacMillan. Coco Gauff answered , “Yeah, it was a very sudden decision. Gavin became

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