Coco Gauff parts ways with her coach days before US Open campaign

• World No 3 dismisses Daly ahead of US Open

• Gauff adds biomechanics guru Gavin MacMillan

• 21-year-old seeks to fix serve woes in New York

Coco Gauff has reportedly split with coach Matthew Daly just days before the start of the US Open, making another shakeup to her support team on the eve of the year's final major. The move was first reported by Bounces.

The world No 3 and two-time major champion will continue to work with her longtime coach Jean-Christophe Faurel but has added biomechanics specialist Gavin MacMillan to her corner. MacMillan was spotted with Gauff during a Wednesday practice session at the Billie Jean King National Tennis Center in New York.