Coco Gauff told exactly what she must change to get ‘the best serve on tour’ by Serena Williams’ former coach

Coco Gauff has been making waves in the tennis world with her powerful game, athleticism, and fierce determination. But even stars need a little fine-tuning, and now one of the biggest coaching names in tennis has offered her some valuable advice.

Rennae Stubbs, former coach of Serena Williams and a respected voice in the tennis community, recently weighed in on how Coco can take her already strong serve to an elite level. According to Stubbs, Gauff has all the tools to possess the best serve on the WTA Tour — but there’s one key change she needs to make.

“She needs to fix her toss,” Stubbs said. “If Coco gets her ball toss right and consistent, her serve could be the best on tour.” That’s high praise coming from someone who has worked closely with Serena, arguably the greatest server the women’s game has ever seen.

Coco’s serve is already one of her major weapons. It’s fast, strong, and often puts opponents on the defensive right from the first shot. However, tennis is a game of fine margins, and the smallest technical flaw can have a big impact at the highest level. A shaky toss can throw off timing, reduce accuracy, and add pressure to each service game.

Stubbs believes that if Gauff can get that toss under control, it will unlock a new level in her game — one that could lead to even more Grand Slam titles and consistent dominance on the tour.

At just 21 years old, Gauff has already achieved more than most players dream of. From her breakout moment at Wimbledon as a teenager to her U.S. Open triumph, she has continued to grow and evolve on and off the court. Her energy, sportsmanship, and humility have made her a fan favorite around the world.

This advice from Stubbs isn’t criticism — it’s a sign of respect. It shows how much potential the tennis world sees in Coco and how close she is to being truly unstoppable.

Fans can be sure of one thing: Coco is always listening, always learning, and always improving. If she takes this tip to heart, the tennis world better be ready. A sharper serve from Coco Gauff might just mean trouble for everyone else.