The data that demonstrates how Sinner's changes in his serve are starting to work

Jannik Sinner has been transparent in revealing that he is in the midst of technical and tactical adjustments in various aspects of his game, especially in his serve. There was curiosity to see if that would be noticeable in his first match at the ATP Beijing 2025, and indeed it has. The Italian finished with a 77% first serve rate, a figure he had previously achieved only three times.

77% of first serves in play for Sinner ✨

According to Tennis Abstract data, this is only the fourth time in his career that Jannik has put at least 77% of first serves in play pic.twitter.com/fmcaZHa2yq

— Giovanni Pelazzo (@giovannipelazzo) September 25, 2025

This is an automatic translation. You can read the original news, El dato que demuestra cómo los cambios de Sinner en su saque empiezan a funcionar