Coco Gauff is heading back to the Slam that defined her career. At just 19, she made history by winning the 2022 US Open, but the years since have brought both highs and lows. In 2025, she claimed the French Open title, yet the season has been rocky overall. Across 47 matches, she’s racked up a staggering 320 double faults, leading to tough exits after Paris. Now 21, Gauff has taken decisive action, hiring a biomechanics expert to address her serve. Could this change spark another breakthrough?

Legendary coach Rick Macci—who trained Serena and Venus Williams in their early years—might already have the answer. Taking to X, he shared his observation: “Just from watching limited video of Coco practicing her serve major biomechanical modifications have been made and you can see the differen

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