It’s hard to declare Coco Gauff ‘s season as either overwhelmingly good or bad. On the one hand, she won her first Grand Slam since 2023. On the other, her overall consistency has since taken a hit. The 21-year-old has had an inaccurate service game while being plagued by double faults. But to fix the deficiencies, Gauff brought in a new team member: Gavin MacMillan, a biomechanics expert and serve ‘doctor’ of sorts who helped fix Aryna Sabalenka’s service woes a couple seasons ago. It’s been two months since the appointment, and McMillan has finally opened up about how the collaboration with Gauff is going.

Despite bringing MacMillan on board right at the start of the US Open, overhauling one’s service motion is not a quick or easy process. But Gauff has shown signs of returning to

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