Coco Gauff brought in Gavin MacMillan after the 2025 US Open, hoping he could help sort out her well-documented serving problems. The American recorded more double faults than anyone else on the WTA ...
Coco Gauff is still having issues with her serve, despite working with a biomechanics expert for almost half a year. Gauff brought in Gavin MacMillan last August, hoping he could help sort out the ...
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