American world number six Coco Gauff has ended her partnership with coach Brad Gilbert, just two weeks after what she described as a “disappointing” US Open title defence.
Gauff, 20, won her first career major last year in New York under Gilbert’s guidance.
But this year she lost in the fourth round to her compatriot Emma Navarro.
“Coco, at 20, your future looks incredibly bright and I wish you nothing but continued success,” Gilbert, who also coached former Grand Slam champions Andre Agassi, Andy Murray and Andy Roddick, wrote on X.
“I look forward to the next chapter in my coaching career.”
Gauff hired Gilbert to work with Spanish coach Pere Riba after he was knocked out in the first round at Wimbledon last year.
That led to a turnaround in her fortunes, as Gauff won 18 of her next 19 matches in her home match on hard courts, leading to title wins in Washington, Cincinnati and New York.
By beating Aryna Sabalenka in the US Open final, she recorded her twelfth consecutive victory, a personal best.
Riba left the team in November, leaving Gilbert as sole head coach.
This year, Gauff has not reached a final since defending his title in Auckland in January.
After reaching the semifinals of the Australian Open and French Open, she was defeated in the fourth round of Wimbledon and reached the same final at the US Open.
Her weak serve – she hit 19 double faults against Navarro – and forehand made it questionable whether she would continue against Gilbert.
“Thank you Coco and the entire team for an absolutely amazing summer run in 2023 and for 14 months of incredible team effort,” added Gilbert, 63.
