Bounces

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How Aryna Sabalenka Rebuilt to the Top

Ahead of the U.S. Open, a look back at Sabalenka's remarkable biomechanical transformation with Gavin MacMillan

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Ben Rothenberg
and
Molly McElwee
Aug 24, 2025
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NEW YORK — As Bounces reported a few days ago, one of the biggest storylines heading into this year’s U.S. Open is Coco Gauff making a change to her coaching team shortly before the tournament, adding biomechanics expert Gavin MacMillan to help rebuild her serve.

Gavin MacMillan on court with Coco Gauff on Wednesday at the U.S Open (Photo by Nick McCarv…

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A guest post by
Molly McElwee
Journalist covering women’s sport and tennis. Author of BUILDING CHAMPIONS. Words featured in the Guardian/Observer/Telegraph/Financial Times/BAGEL Magazine. Sharing my take on standout stories, exclusive interviews and what it’s like to cover sport.
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