Jannik Sinner's Serve Overhaul Amazes Top Players

Italian tennis star Jannik Sinner has dramatically improved his serve, recording a 92.9% service‑game win rate and ranking second on the ATP for serve percentage. His first‑serve points won (80.9%) and second‑serve points won (58.1%) are also leading figures, contributing to a 44‑3 win‑loss record, five Masters 1000 titles, a Wimbledon defense and a fifth Grand Slam title.

Sinner’s coach Darren Cahill instructed him to study John Isner’s serve and emulate its technique, a strategy that the players praised on the "The Player’s Box" podcast. WTA stars Jessica Pegula and Madison Keys called the improvement "the most improved shot on tour" and described his serve as "insane" and "a joke" in a positive sense. Both commentators noted the consistency of Sinner’s wide serve on the ad side, which now produces aces at a high rate.

The surge in his service game positions Sinner as world No. 1 and sets him up for the upcoming North American hard‑court swing, beginning with the Canadian Open in Montreal.