Former world No 1 Justine Henin has proclaimed that the \u201clack of evolution\u201d in Coco Gauff\u2019s game worries her after the American star\u2019s exit from the 2025 US Open.<\/p>\n
Gauff<\/a> suffered a crushing 3-6, 2-6 defeat to 23rd seed and four-time Grand Slam champion Naomi Osaka in the last 16 at Flushing Meadows in Arthur Ashe Stadium on Monday.<\/a><\/p>\n In a lopsided contest, Gauff hit eight winners, but lost a mammoth 33 of the 88 points in the match with unforced errors, five of which were double faults.<\/p>\n The world No 3 won only 54% of her service points as she was broken four times in her nine service games by her Japanese rival.<\/p>\n Former world No 1 Osaka<\/a> won 94% of points behind her first serve and lost only six of 38 total points on her serve, while she had only one service game where she lost more than a single point.<\/p>\n In the week before the US Open<\/a>, Gauff took the big decision to replace her coach Matt Daly with biomechanics expert Gavin MacMillan \u2014 with the aim of solving her serving struggles.<\/p>\n The 21-year-old, who is a two-time major winner, changed her service motion despite the short window before her home Grand Slam tournament began.<\/p>\n Coco Gauff News<\/p>\n Why the time has come for Coco Gauff to take a step back from competitive tennis<\/a><\/p>\n Why Coco Gauff has every reason to be \u2018excited\u2019 despite US Open exit<\/a><\/p>\n Gauff showed immense resilience to battle through major issues with her game and stress in her first two matches against Ajla Tomljanovic and Donna Vekic before claiming a routine third round win over Magdalena Frech.<\/p>\n