Coco Gauff has decided to shake up her coaching team just days away from the US Open.
The two-time Grand Slam winner has parted ways with coaches Matt Daly and J.C. Faurel.
Gauff had been working with Daly since last year after a split from Brad Gilbert.
There were initial signs of success in that partnership as the 21-year-old won the China Open and WTA Finals at the end of 2024.
She then went on to capture her second Grand Slam singles titles by winning the French Open in 2025.
This was added to the US Open title she won in 2023.
However, her form has struggled after the clay court season and she suffered a shock first-round defeat at Wimbledon.
The struggles with her serve has been evident as she hit 23 double faults in a match against Danielle Collins at the Canadian Open.
Now she will turn to biomechanics expert Gavin MacMillan, who has previously worked with Aryna Sabalenka to fix her serve.
Reaction to Gauff’s change
Her former coach Darren Cahill was complimentary about MacMillan and what changes he could bring to Gauff’s game.
“A lot of things add up and this could be a really good relationship,” ESPN’s Darren Cahill said of MacMillan.
“He’s very thorough ….I’ve spoken to him many, many times before and the fact that he’s got experience with different athletes from different sports, both male and female, he uses the new technology, he goes to the video a lot, really breaks down the biomechanics.”
Why is Coco Gauff struggling?
After hitting so many double faults, she was honest about where she needed to improve even though she felt good in practice.
“Obviously, I am disappointed in myself when it comes to that part of the game because I didn’t play D.C. [Citi DC Open] to work on that and made changes to that.
“Doing well in practice and serving really well in practice. I just would like it to transfer to the match.
“I know I probably won’t be ever double fault-free, but if I could get that to 2 per cent, 3 per cent, it would make a big difference in just making these matches a lot easier.”
When is the US Open?
The US Open starts on Sunday with the women’s singles final on September 6.
Gauff will be the second seed at Flushing Meadows behind world no.1 Aryna Sabalenka.
Iga Swiatek is the third seed with Gauff’s compatriot Jessica Pegula in fourth.