Coco Gauff’s biggest flaw continues to haunt her. It was there during her US Open round of 16 exit at the hands of Naomi Osaka. It was there when she was leading records for double faults and choppy serves. Sure, she’s working with a “serve doctor,” Gavin MacMillan, to improve things now, but Serena Williams’s ex-coach now believes that very flaw has the potential to become her biggest weapon.

In a tweet posted to his X account, Rick Macci said, “ Because Coco fights and can fly, she never says good bye. Her serve will become her best shot and she contend again for the number one spot. If she is reprogramed with the more compact explosive ATP FOREHAND, the Delray Dart will be number one in the land. @CocoGauff. ”

The 69-year-old Floridian coached Venus and Serena Williams in their

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