New Delhi, Aug. 21 -- Ahead of the US Open 2025, two-time Grand Slam winner Coco Gauff decided to part ways with her coach Matt Daly.

The world No. 3 split with Daly, a grip expert whom she brought on board late last year, replacing him with biomechanics specialist Gavin MacMilan, according to Olympics.com.

MacMilan was seen practising with Gauff - who has yet to address the change herself - on Wednesday (20 August) at the US Open in New York. Her long-time coach, Jean-Christophe Faurel, stays with the team.

MacMilan is widely credited in the industry for rectifying Aryna Sabalenka's serve. Sabalenka is currently the world's top-ranked player.

Gauff has had double-fault issues as of late and is counting on MacMilan to work his magic t...