Pegula and Keys are amazed by Sinner's new serve: "It's crazy"

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Jannik Sinner seems like a perfect machine, but he always manages to upgrade to an even better version. As of today, the reigning champion of Wimbledon 2026 dominates all tennis strokes: forehand, backhand, return. However, the aspect that has improved the most and has become his main weapon and threat is his serve.

Looking at the ATP statistics, the improvement is evident. In 2024, the year he won two Grand Slams and six more titles, his first-serve percentage was 61%, while points won on his second serve were at 58%, and the percentage of points won with his first serve was 79%. Thus, it was clear that these figures needed enhancement.

In 2025, he again won two more Grand Slams and added another four titles to his record, but his serving performance remained questionable. The first-serve percentage stayed low at (62%), as did the points won with the second serve (59%), while the points won with the first serve remained at 79%.

Pegula and Keys on Sinner’s serve:

“Basically it’s like: pick someone to watch and then just try to copy their serve. He watched John Isner and he was like ‘Okay, got it!’.”

“They should give awards. Sinner’s serve is a joke. Every time I watch him, I’m like ‘there’s no way…

— janniksin archive (@sinnervideos) July 17, 2026

Jannik Sinner has more aces in the first half of 2026 than in the entire 2025

Until this 2026, the Italian, along with his team led by Simone Vagnozzi and Darren Cahill, decided to improve these statistics and take a leap in quality. And they succeeded. The first-serve percentage rose to 65%, and points won with the first serve stand at 81%, while points won with the second serve (59%). By the mid-year mark, he has already hit more aces (454) than in the entire previous season (405). This improvement was crucial to retain his title on the grass at Wimbledon, a surface where a strong serve can give you half the match.

The feeling of being a big server, little by little, is also being observed by both his male circuit rivals and his female circuit colleagues. Jessica Pegula and Madison Keys mentioned this on The Player’s Box podcast.

The current number three in the WTA rankings showered him with praise: "It's the stroke he has improved the most. His serve is insane. His wide serve on the ad side is incredible. Every time I see it, I think, 'oh, I know that's his favorite serve'. And you know, it's a low-percentage serve. You always think, oh, he can't do it again. But every time, he hits an ace. I don't understand. How did he improve his serve so much?".

While the champion of the 2025 Australian Open revealed who Sinner looked at to enhance his service: "I think I heard Darren Cahill talk about it when he started with Jannik. One of the important things was to improve his serve. That's his thing. Basically, you pick someone to watch and try to copy their serve. And he watched Jon Isner and said 'okay, got it. That's my kind of serve and my average serve'".

It remains to be seen whether with the start of the North American hardcourt tour, on another surface that emphasizes serving, Jannik Sinner maintains a trend that makes him even more unstoppable.

This news is an automatic translation. You can read the original news, Pegula y Keys alucinan con el nuevo saque de Sinner: "Es una locura"