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Story summary
- Coco Gauff, ranked No. 3, is experiencing serving difficulties at the U.S. Open after a recent coaching change.
- She has shown emotional distress during matches but still secured victories despite numerous double faults.
- Experts recommend Gauff take a break to refine her serve mechanics with her new coach, Gavin MacMillan.
- Her situation highlights the challenges of adapting to technical changes under pressure.
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