Gauff replaced Daly with biomechanics expert Gavin MacMillan in a bid to fix her serve, which caused her real problems in Canada and Cincinnati.<\/p>\n
![\"Gavin](\"https:\/\/www.newsbeep.com\/us\/wp-content\/uploads\/2025\/10\/GettyImages-2230664038-1024x614.jpg\")
Photo by Robert Prange\/Getty Images<\/p>\n
With MacMillan in her corner, Gauff reached the fourth round of the US Open<\/a>, where she fell to Japan\u2019s Naomi Osaka in straight sets.<\/p>\n As she now prepares for her quarterfinal match in Beijing, Gauff has been told by a former Olympic<\/a> gold medalist that perhaps the serve wasn\u2019t her biggest problem after all\u2026<\/p>\n Elena Dementieva was surprised Coco Gauff didn\u2019t focus on improving her forehand instead of serve<\/p>\n During the latest episode of \u2018Hardcourt\u2019, 2008 Olympic gold medalist Elena Dementieva shared her thoughts on Gauff\u2019s<\/a> latest coaching hire.<\/p>\n \u201cI\u2019m surprised that she chose a serving specialist, because in my point of view, it would be a good idea for her to somehow reconsider her forehand,\u201d she said.<\/p>\n \u201cShe is, of course, very well physically developed, but there is a one-handed game going on there. Right now, she\u2019s just saving herself with her good physical shape, but there are some significant areas that can be corrected.\u201d<\/p>\n Dementieva isn\u2019t sure the double faults are holding Gauff back as much as she thinks.<\/p>\n \u201cI\u2019m surprised, because you know she says she makes a huge amount of double faults, but it doesn\u2019t stand out in the game,\u201d she said.<\/p>\n \u201cYou know, she wins Grand Slams with them, and when she makes them, is it a psychological problem or a physical one. I can\u2019t say that I associate it with the technique.\u201d<\/p>\n The Russian may not believe the double faults are a big problem for Gauff, although the stats tell a different story.<\/p>\n Gauff has made 100 more double faults than all but one player on the WTA Tour<\/a> so far in 2025.<\/p>\n WTA double fault leaders in 20251. Coco Gauff \u2013 3472. Ekaterina Alexandrova \u2013 2523. Marta Kostyuk \u2013 2414. Alycia Parks \u2013 2405. Jelena Ostapenko \u2013 2336. Amanda Anisimova \u2013 2307. Linda Noskova \u2013 2298. Daria Kasatkina \u2013 2209. Dayana Yastremska \u2013 21910. Ashlyn Krueger \u2013 215<\/p>\n The world number three has been without serving expert MacMillan this week, but the double-faulting numbers have remained consistent.<\/p>\n After averaging 6.75 double faults per match with MacMillan at the US Open, Gauff has averaged 6.3 per match without him at the China Open.<\/p>\n TournamentDouble faultsMatchesAverage double faults per matchUS Open2746.75China Open1936.3Coco Gauff\u2019s double faults at the US Open and China Open<\/p>\n Gauff will hope those numbers don\u2019t rise during the latter stages of the tournament, as she looks to defend her title in Beijing.<\/p>\n Who will Coco Gauff play next at the China Open?<\/p>\n Winning two of her first three matches at the China Open in a deciding set, Gauff booked her place in the quarterfinals.<\/p>\n 2025 China Open 2R \u2013 Coco Gauff defeated Kamilla Rakhimova, 6-4, 6-02025 China Open 3R \u2013 Coco Gauff defeated Leylah Fernandez, 6-4, 4-6, 7-52025 China Open 4R \u2013 Coco Gauff defeated Belinda Bencic, 4-6, 7-6, 6-2<\/p>\n There, she will meet Germany\u2019s Eva Lys, the world number 66.<\/p>\n Gauff will set foot on the court as a heavy favorite to reach the semis, where she would play either Amanda Anisimova<\/a> or Jasmine Paolini.<\/p>\n The American doesn\u2019t hold a winning record against either player, but would be eager to get her revenge on Paolini, having lost to her three times in 2025 alone.<\/p>\n Coco Gauff vs Amanda AnisimovaMatchWinnerLoserScore2022 Wimbledon \u2013 3RAmanda AnisimovaCoco Gauff6-7, 6-2, 6-12021 Parma \u2013 QFCoco GauffAmanda Anisimova6-3, 6-3Coco Gauff and Amanda Anisimova\u2019s head-to-head recordCoco Gauff vs Jasmine PaoliniMatchWinnerLoserScore2025 Cincinnati Open \u2013 QFJasmine PaoliniCoco Gauff2-6, 6-4, 6-32025 Italian Open \u2013 FJasmine PaoliniCoco Gauff6-4, 6-22025 Stuttgart Open \u2013 QFJasmine PaoliniCoco Gauff6-4, 6-32023 Cincinnati Open \u2013 QFCoco GauffJasmine Paolini6-3, 6-22021 Adelaide International \u2013 1RCoco GauffJasmine Paolini6-4, 6-7, 6-2Coco Gauff and Jasmine Paolini\u2019s head-to-head record<\/p>\n![\"Coco](\"https:\/\/www.newsbeep.com\/us\/wp-content\/uploads\/2025\/10\/GettyImages-2237527800-1024x683.jpg\")
Photo by WANG ZHAO\/AFP via Getty Images<\/p>\n