Smarter tennis coaching through AI‑powered video analysis. Discover how biomechanics and data science can help you improve toss consistency, trophy position, knee bend, hip rotation, and serve speed.
The ball toss is the foundation of every great tennis serve. Our AI analyzes your toss height, placement, and consistency to identify the optimal ball position for maximum serve power and accuracy.
Toss Height: The vertical distance between your shoulder and the ball at its peak. Measured in pixels and converted to centimeters for real-world accuracy.
Our system identifies the exact frame where your toss hand reaches its highest point, typically occurring in the first half of the serve motion. This helps analyze the timing and coordination between your toss and racket preparation.
Common Tennis Serve Toss Faults: Tossing too low forces rushed swing mechanics and reduces serve power. Tossing too far forward or backward causes off-balance serves and inconsistent ball placement.
The trophy position is where you store elastic energy before exploding into the ball. This critical serve phase determines your power potential and injury risk. Our AI measures racket drop depth and elbow positioning for optimal serve mechanics.
Racket Drop: The vertical distance between your elbow and wrist at the trophy position. This measures how far the racket head drops behind your back, creating the "scratch your back" position that professional tennis players use to generate massive serve speed.
The angle formed by your wrist, elbow, and shoulder at the trophy position indicates proper shoulder external rotation - a key biomechanical factor in generating serve speed while protecting your shoulder from injury.
Optimal elbow angle for power and safety
Excellent racket drop creates whip effect
Professional Tennis Serve Technique: ATP and WTA pros achieve racket drops of 50+ pixels, creating the characteristic "bow and arrow" position that generates 120+ mph serve speeds.
Your legs generate 50% of your serve power. Our AI measures knee bend angle at the trophy position to ensure you're using leg drive effectively in your tennis serve motion.
The angle formed by your hip, knee, and ankle at the trophy position. This measurement reveals whether you're loading your legs properly to drive upward into the ball.
130-150 degrees represents the sweet spot where your quadriceps muscles can generate maximum upward force without compromising balance. Too bent (smaller angle) causes instability, while too straight (larger angle) fails to utilize leg power.
Common Mistake: Recreational players often serve with straight legs (>160°), eliminating half their potential serve power. Professional tennis players consistently achieve 130-150° knee bend, driving up explosively through the ball.
The contact point determines serve placement, power, and spin. Our AI analyzes contact height, arm extension, and timing to optimize your impact position.
Contact Height: Vertical distance from your nose to your wrist at contact. This indicates how high you're reaching at impact - critical for serve angle and clearance over the net.
The vertical distance between your shoulder and wrist at contact. Maximum extension creates the longest possible lever arm, generating greater racket head speed and allowing steeper serve angles into the service box.
Arm extension for maximum reach
High contact point creates angle
Pro Tip: Professional tennis players make contact 2-3 feet above their head, creating severe downward angles that recreational players can't replicate with lower contact points.
Track your serve speed progress with AI-powered velocity measurement. Our system estimates serve speed by analyzing racket head velocity at contact, helping you understand how technique changes affect your serve power.
Our AI tracks your wrist movement (proxy for racket head) through a window around the contact point, measuring maximum velocity. This velocity is converted to miles per hour using calibrated biomechanical multipliers.
The system reports confidence based on the number of velocity samples captured:
Important Note: Serve speed estimates are calibrated but may vary based on video quality and camera angle. For exact speeds, use radar guns. This metric is most valuable for tracking relative improvements in your serve technique over time.
Your serve receives a comprehensive score based on all biomechanical components. Each element is weighted equally, and the system generates personalized coaching recommendations.
Excellent
Professional-level technique
Good
Solid fundamentals
Needs Work
Room for improvement
Based on your scores, the AI generates specific, actionable recommendations:
Get instant, professional-level feedback on your serve technique. Upload your video and receive detailed biomechanical analysis in seconds.
Analyze Your Serve NowOur AI uses MediaPipe pose detection, trusted by sports scientists. While exact speeds vary, relative improvements are highly reliable for identifying serve mechanics and progress.
Standard smartphone video (720p or better) from a side view works best. Ensure your full body is visible throughout the serve motion for optimal tracking accuracy.
Yes. Studies show that improving toss consistency, trophy position, and knee bend can add 15–30 mph to your serve speed.
Weekly analysis during active serve development provides the best feedback loop. Once your technique stabilizes, monthly check-ins help maintain consistency and catch regression early.
Our AI tracks toss height and placement. Aim for 30–50 cm above your contact point for optimal power and accuracy.
The ideal knee bend is between 130–150 degrees. This range maximizes leg drive and upward force without compromising balance.
Professional players make contact 22–35 cm above their head. A higher contact point improves trajectory, spin, and net clearance.
Hip and shoulder rotation generate core torque. Optimal rotation (60–100 degrees) transfers energy through the kinetic chain, adding speed and reducing injury risk.
Yes. By monitoring elbow angles, shoulder rotation, and balance, AI highlights risky mechanics and provides recommendations to reduce strain on joints.
AI analysis provides objective data and recommendations, but combining it with a coach’s guidance ensures faster improvement and personalized training.