Coco Gauff's decision to part ways with coach Matt Daly and replace him with a renowned biomechanics expert ahead of the 2025 US Open was recently assessed by prominent tennis insider Gill Gross.

Gauff's serve struggles have reemerged of late after a period of improvement with coach Matt Daly, who is now off her team.

Matthew Daly is out and Gavin MacMillan is in to correct Coco's spate of double faults that has put her in a deep tailspin since winning the French Open.

The US Open singles draw runs from August 24 to September 7. Stay locked into Sports Illustrated's Serve On SI for all of your tennis news from the court and beyond. Interview: Aryna Sabalenka is using wearable technology to transform her game. Interview: Madison Keys talks Nasal Strips in tennis, 2025 WTA season, and US Open.

See the list of the 10 highest-paid tennis players, who collectively earned $285 million, led by the sport's next great rivals: Carlos Alcaraz and Jannik Sinner.

Tennis player Coco Gauff teams up with Naked for a pineapple-orange protein smoothie with 20g of protein. The drink is fruit-based, with no added sugars or artificial sweeteners, plus electrolytes from coconut water. Its vibrant taste and smooth finish makes it a nutritious, enjoyable pre-workout option.

Coco Gauff's 2025 season has been a rocky ride, but she's choosing to have a short memory as she prepares for the US Open.