Just days ahead of taking the 2025 US Open court, US tennis star Coco Gauff has reportedly parted ways with coach Matthew Daly, after he helped guide the world No. 3 to her first French Open title earlier this year.
Gauff originally hired Daly, a grip specialist, following a disappointing 2024 US Open run, ultimately finishing out the season by adding 2024 China Open and 2024 WTA Finals hardware to her trophy case.
However, despite her breakthrough performance at this year's Roland Garros, the 21-year-old has struggled with her serve this season, most recently registering 42 double faults across her three matches at the 2025 Canadian Open and 16 in her 2025 Cincinnati Open quarterfinal clash.
In Daly's absence, Gauff will still be working with longtime coach JC Faurel while also adding Gavin MacMillan to her 2025 US Open team — a biomechanics specialist who No. 1 Aryna Sabalenka has credited for helping her find consistency with her serve.
"I'm very much a perfectionist type of person," Gauff recently told reporters. "So it's really nothing satisfying until you're holding the big trophy, to be honest."
Gauff's next shot at a big trophy begins on Sunday, when the main draw of the 2025 US Open — the last Grand Slam of the year — hits courts in Queens, NY.
The 2023 US Open champion will face Australia's No. 84 Ajla Tomljanović in her first-round match.