Paul Lefiti

Paul Lefiti has spent more than 20 years studying the biomechanics of the tennis serve and is widely regarded as one of the most detailed and insightful serve analysts in the game. In this CoachLife series, Paul breaks the serve down into its core components with exceptional clarity, covering everything from grip and stance to advanced sequencing, hip loading, supination, and the critical transition from the wind-up into the acceleration phase. The series also includes an in-depth live correction session with 13-year-old player Mia, UTR 6.9, where Paul analyzes her serve using motion capture and speed tracking. Through this real-time breakdown, he identifies key issues such as toss placement, sequencing errors, structural inefficiencies in the wind-up, and power leaks in the kinetic chain. He then walks through exactly how to correct them step by step. Across the series, Paul explains the underlying biomechanics of the serve in extraordinary detail, covering: Serve setup, grip, and stance structure. Toss mechanics and eye control. Power stance and hip loading. Supination and eliminating the “waiter’s tray.” The stabilizer arm and axis control. Advanced sequencing patterns used by elite players. The axial snap and racket-head acceleration. Kick-serve mechanics and spin generation. Recovery and movement after the serve. Paul works with players across all levels and is known for helping advanced servers increase their speed dramatically, often taking players from 110–115 mph serves into the 130 mph range through improved mechanics and sequencing. When working with players in person, Paul uses an advanced analysis setup that includes three cameras when traveling and a four-camera system at his base, along with a speed gun positioned at the net to accurately track serve velocity. Each session includes a full voiceover breakdown of the motion, allowing players to clearly understand exactly where power is being created—or lost—throughout the kinetic chain. His approach combines deep biomechanical understanding with extremely clear coaching cues, making complex serve mechanics easier for players and coaches to understand and apply. Paul will also be working with CoachLife to launch CoachLife Serve Labs, beginning in Fort Lauderdale, where players can receive ongoing analysis, video feedback, and structured serve development. If you want to truly understand how the serve works—and how to build a faster, more efficient motion—this series is essential viewing.