"We want Sinner to reach his peak between the ages of 28 and 30"

Jannik Sinner's coaches explain the improvement of the Italian and reveal some of the secrets to his success at the 2025 ATP Finals.

Diego Jiménez Rubio | 17 Nov 2025 | 07.22
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Simone Vagnozzi makes tactical changes for Sinner. Photo: gettyimages
Simone Vagnozzi makes tactical changes for Sinner. Photo: gettyimages

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Exultant and proud of the work done and to see how Jannik Sinner continues to make history. This is how the two great architects of the Italian player's tennis progression, Simone Vagnozzi and Darren Cahill, appeared at the press conference of the ATP Finals 2025.

Behind a great sports star, there are always brilliant minds capable of guiding their steps in the right direction and squeezing their potential beyond imagination. The figure of Jannik Sinner is not understood without the work carried out by one of the most brilliant and cohesive coaching duos in recent history of our sport. Simone Vagnozzi and Darren Cahill have a great responsibility in the unparalleled success of the Italian player and spoke after his victory in the ATP Finals 2025.

This is how Sinner's coaches explained his success over Alcaraz at the ATP Finals 2025

Assessment of the final

"It was a very exciting and close match. Both alternated moments of great brilliance with other stretches where they made more errors than desired. The most important thing is that we always saw Jannik with a great attitude and he kept the faith that he could win the match, even when he was behind in the score during the second set. We have identified aspects of the game that can still be perfected, but what he has achieved is incredible, and we are eager to continue working for the upcoming season," stated Vagnozzi.

Technical and tactical changes in Sinner's game

"In the US Open final, we realized that some adjustments needed to be made, mainly in the serve. We modified his movement slightly, gave more momentum to his serving mechanics, and since the Shanghai tournament, Jannik has been serving greatly. We are fortunate that Sinner learns very quickly and has perfectly understood the new shots and tactics we wanted him to develop. Our goal for 2026 is for him to be even more aggressive," affirmed the Italian coach.

Darren Cahill, keys to Sinner's success. Photo: gettyimages

Sinner's room for improvement

"There is nothing more important in tennis than the serve because it is the only shot where you have absolute control over what you can do. The five weeks we trained the new serve were great, and Jannik has been able to increase his first serve percentage and find better angles, bringing the ball closer to the lines. In the return, you depend on your opponent, but once he gets the ball in play, Jannik knows how to apply a lot of pressure," he explained.

"We try to learn from the Big 3 and implement their virtues in Sinner so that he keeps growing. We still believe he has room for improvement with the return, and that is what is truly exciting about working with someone like him. His best tennis will come when he is 28, 29, and 30," highlighted Darren Cahill, who spoke highly of Alcaraz. "We have a great appreciation and admiration for him; he is an incredible player," commented the Australian, who neither confirmed nor denied whether he will continue in 2026 as part of Sinner's team.

Variation in speeds by surface and how Jannik Sinner adapts

"Our feeling is that there are speed changes between surfaces. For example, this court in Turin has been quite fast in recent days, especially. There is a huge difference between the Indian Wells court and that of Cincinnati, for instance. What we do believe is that they should slightly increase the speed of the balls, seeking a standard ball that would allow players to get used to it and play most of the year with the same one. It is true that the grass is a bit slower than 20 years ago, but it is not worrisome at all; tennis remains spectacular," commented Cahill.

"Regarding Jannik's adaptability, I would say that our main goal now is for him to improve his performance on clay. We believe he can do well in all types of conditions and can reach his peak level outdoors as well, not just on indoor courts," asserted the renowned Australian coach. Ultimately, Jannik Sinner has two true engineering minds of this sport alongside him, maximizing all his potential, such as Simone Vagnozzi and Darren Cahill.

This news is an automatic translation. You can read the original news, "Queremos que Sinner alcance su máximo nivel entre los 28 y los 30 años"