Gauff's flaw forgotten on winning US Open return
At last year's US Open, Coco Gauff's serve left her practising in the rain and crying on court - now it is a potent weapon.
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Notable Quotes
"Now it's like I can look back a year on and think, 'Oh, wow, it's a big difference'."
— Coco Gauff , Athlete
"Psychologically, I'm now going to go for the ace, or I know I can hit the serve and the return is probably not going to come back."
— Coco Gauff , Athlete
Key People
Coco Gauff is a two-time Grand Slam singles champion and the youngest player to reach the semi-finals at all four Grand Slams since Maria Sharapova.
Gavin MacMillan is a biomechanics expert who has helped athletes improve their serving techniques.
Zeynep Sonmez is a Turkish tennis player.
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At last year's US Open, Coco Gauff's serve left her practising in the rain and crying on court - now it is a potent weapon.
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