Jannik Sinner’s journey to elevate his serve began after his four-set defeat to Carlos Alcaraz in the US Open final. The Italian gathered his team, led by Simone Vagnozzi, and worked intensively on refining his technique. They focused on adjusting the toss, tightening mechanics, and creating a more reliable platform to build consistency and power.
Dominance in the indoor season
The improvements quickly translated into results during the indoor swing. In Vienna, Paris, and especially Turin, Sinner showcased a new level of precision and first-strike tennis. Across 15 matches, he was broken only seven times and faced just 15 break points at the ATP Finals in Turin. He saved 14 of them, losing serve only once against Alcaraz in the final. This run marked the most dominant serving performance at the year-ending championship since the ATP began tracking statistics in 1991.
Confidence and momentum
The enhanced serve gave Sinner more free points, cleaner holds, and constant pressure on opponents. It raised his overall game, allowing him to play with greater confidence and clarity. His ability to combine explosive baseline play with a reliable serve has positioned him as a serious contender for the ATP throne in 2026.
Becker’s praise for Sinner’s progress
Boris Becker highlighted the transformation as a crucial turning point in Sinner’s development. He told Eurosport: “I think Simone Vagnozzi and Darren Cahill did a fantastic job after the US Open to improve Jannik’s serve. That was the shot he was missing in the summer, especially in the US Open final, when Carlos outserved him. The serve is the only shot your opponent does not play into; it’s completely in your hands. Since September, Jannik has changed his technique and toss a bit. The big difference between the Jannik of the summer and the current one is his serve.”
Eyes on the Australian Open
With his serve now matching the strength of his baseline game, Sinner’s climb to the top looks more sustainable than ever. His immediate target is the defense of his Australian Open title in January, a challenge that could further cement his place among the sport’s elite.
Jannik Sinner in 2025
At the moment ranked no.2, Sinner played his last match on the 16th of November when he beat world no.1 Carlos Alcaraz 7-6(4) 7-5 in the final in the Nitto ATP Finals to win his 25th career title.
Until now, during this year Sinner has achieved a 58-6 record. The Italian clinched 6 titles in 2025 at the Australian Open, Wimbledon, Beijing, Vienna, Paris and the Nitto ATP Finals. The Italian got to the final in Rome, French Open, Cincinnati and U.S. Open.