Jack broudy pictured with steve forman and steve johnson after winning nationals

Learn to move & play like a natural athlete

The three non-linear fundamentals you MUST master to become a natural athlete.
All based on cold hard projective geometry.
Who uses these? None other than Federer himself.
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Unlock The Natural Athlete Within You. What's Inside:

✅ Unlock the secret to effortless power in your tennis strokes using non-linear movements.
✅ Master the Figure 8 hip rotation, a cornerstone technique for advanced play.
✅ Learn how to achieve the perfect 45-degree contact point for optimal accuracy and power.
✅ Discover the Sine Wave, a method for fluid, graceful strokes that minimize effort and maximize effect.
✅ Gain insight into a system that blends physics, geometry, and athletic intuition for a revolutionary approach to tennis.
✅ Understand the three fundamental tenets of the Non-Linear System for a consistent, powerful game.
Transform your game from the core, making every stroke more effective and enjoyable.
✅ Designed for all levels—from beginners to professional players looking to refine their technique.
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tennis competition winnersJack broudy pictured with steve forman and steve johnson after winning nationals

Whether you're a beginner 👶, a frustrated player on the verge of quitting 🤬, or a parent tired of the expensive coaching carousel 🤕...

We've been the last and best coaches for 1000s of players with the Nonlinear System ❤️

My brother and I have known the fluid strokes and feeling of being "connected" in the game of tennis for much of our lives. It's great to know the science behind this feeling, so we can use this knowledge to play even better. Jack's revolutionary learning system and various devices, including the Swivels, can help every player feel and groove the natural strokes.

The Swivels are a great teaching tool to help learn proper coordination and kinetic chain of movement of the coil and uncoil. Learning to be athletic is key and the Swivels are that connection. If you want control and power Excalibur is the place to start. Not that easy to do but boy it teaches you to stay on the ball and compress through the hit which is key to power and control.

Mike Bryan

438 weeks at ATP #1 Doubles, 16 grand slam titles, 119 ATP tour titles, Olympic Gold Medal 2012

The Swivels are a great teaching tool to help learn proper coordination and kinetic chain of movement of the coil and uncoil. Learning to be athletic is key and the Swivels are that connection. If you want control and power Excalibur is the place to start. Not that easy to do but boy it teaches you to stay on the ball and compress through the hit which is key to power and control.

Brian Teacher

Australian Open Champion

Jack Broudy is the first and only tennis coach I have ever worked with (and only online) who has been able to teach me how to master my strokes with a sort of effortless motion. It's actually thrilling to be able to hit a one-handed backhand without feeling that I am muscling and struggling to get the ball back with some pace. I love his lessons on the serve, since they are helping me learn to use core body mechanics to master a graceful stroke, rather than relying on whatever brute force I can muster up with my arm strength alone.   His patented training device, the 8Board, helped me to feel and "own" this essential motion within minutes of stepping on it. I think the Jack's system will help non-athletes add a newfound gracefulness to their time on the court while advanced players will add power, precision and -- perhaps most importantly  -- enjoyment to their game.

Helene Gittleman

I want to take a minute and let you know how much working with you improved my tennis game.  Because of your help, I was able to raise my game to an entirely new level in a very short amount of time.  You simplified my stroke, made it reliable and repeatable, and gave me an entirely new appreciation for how and why to play.  I no longer fixate on how to hit the ball harder because you showed me how to generate power and accuracy with very little effort.  The more I came to understand your method, the more I enjoyed hitting the ball.  This greatly improved my playing as my mindset changed from wanting to finish off points to wanting to hit solid shot after solid shot with the confidence that success would be the result.  Perhaps the most impressive thing about your lessons is how much improvement I got in so little time with you.  Because we're on opposite coasts, we were only on court together four times, but I had radical improvement anyway.  Further, my wife and friend each had significant and lasting improvement in one lesson each.  Can't wait until you’re back in NY and we can hit, or we're lucky enough to be in San Diego!

Alex Weiner

Just to let you know we’re working on the things you taught Nils and I. It’s doing wonders. He is improving so quickly now. It’s so easy to understand. One basic thought that can be applied to all strokes. He is really getting it. I don’t need to say much during practice anymore. We just talk about it before or after.

It seems like the Nonlinear System and the Swivels help him in other sports as well. His rhythm and balance when he plays soccer and kendo are so much better. He is even getting stronger mentally, feeling really good about himself (but not in a cocky way.) Just really harmonious. Through all this he even gets his homework done in no time and he told me he enjoys school much more. Not that we didn’t enjoy it before but we have much more fun now.

So this was to say thank you again! I hope we can meet you again to work some more.

Anders Engström

Tokyo, Japan

I learned to play tennis in the '70's and am a 5.5 player. I have struggled for years with the modern game and trying to hit good topspin off either wing. After 15 minutes of my first lesson with Jack Broudy on the Swivels I was hitting topspin effortlessly and with power. I have been using the Swivels and the Nonlinear Tennis System daily now and am more consistent and hit with more topspin, power and feel. I'm in love with tennis again. This is the best system for players at any level of the game and I truly believe that if you want to learn properly or improve your game, the Non-Linear Tennis System is the only way to go.

Keith S. Wilkinson

As a direct result of Jack's revolutionary teachings, Karen as well as my son Steven, have earned full tennis scholarships to play college tennis. Thank you Jack!

Michael Forman

Father of Steven and Karen Forman, Wake Forest, NCAA All American 2008 and NCAA Champs

Jack Broudy is one of those rare people that takes a fresh look at old dogma and discovers a deeper truth.  Jack has taken the tennis strokes and made sense of what is truly occurring in that whirl of activity, focusing on a few fundamentals of sound physical principals.  As an Applied and Clinical Kinesologist I appreciate the simplicity and safety of his methods.  Done properly it is hard for the tennis player to injure themselves and they truly use the core of the body that they have worked so hard to develop yet not known how apply in the strokes on the court.  The results are graceful, repeatable and powerful tennis shots that are joy to watch a and hit!   Thanks to Jack for his insights and dedication to tennis truth.

Andrew W. Specht BS, JD, DC

I always struggled with driving my forehand in match play. Until I learned about using a 45-degree angle with my feet on the semi-open stance, and about hitting the ball at a 45-degree angle in front of me. Yesterday I won a set 6-2 over someone I always lost to, because I visualized those 45-degree angles. It was the first time I ever consistently hit driving forehands in match play.
I was always told to hit the ball out in front on the forehand, but where out in front? The 45-degree rule gave me the specific answer I needed. Thank you Jack Broudy!

Sa Cool

It amazes me after after several coaches no one taught the idea of leading with the hips. Just that alone gave me immediate improvement in my ground strokes.

I was leading with a unit turn and was so off balance and disconnected. Zero power from the ground and very very unstable. The ball could go anywhere. No confidence.
As you rightly say the tail was wagging the dog.
The figure 8 movement is a light bulb moment. I was looking for that for a long time. I started tennis when I was 8 and stopped when I was 16. I did the figure 8 unconsciously and had great ground strokes. I resumed tennis at 38 years of age and had no idea what happened to my forehand. I lost that deep secret. For the last 8 years. I’ve been getting all the the common tips yet still totally unstable and inconsistent in all my shots.
The figure 8 connected me to my true core and the ground driving my arms and shot.
Still got plenty of work to do also lining it up at the 45° and the sine wave.

Dan Serofim

So just come back - lost 4 & 4, no complaints with the result and very glad I stuck to trying to hit at the 45 and use my hips during each point.
What I noticed with the majority of my poor shots & unforced errors was that my swing pattern was very straight and the follow through got stuck in front. Whereas positive shots felt like I had a far more angular swing that stemmed from aligning my hips to the 45 during preparation.
Have a match tomorrow so hoping to see less 'straight swing' shots. Will focus on my hip direction (at the 45) in setting up each shot - I feel like this will help a lot in falling into the straight swing path that cost me a lot today. Glad I was able to park the ego and concentrate on the process...the loss hurts the pride but there is a bigger picture to consider!

Joe Radmore

Top coaches are big fans of the Nonlinear System 🤜🤛

All Jack’s kids are great! They have smooth strokes and complete games. I’ve use the Swivels for the past ten years with both my varsity teams and my Nike camps. Everyone loves it because you can really feel the fluid strokes!

Peter Smith

USC Men’s Coach, 5 NCAA Championships (4 in-a-row '09-12), 2-Time ITA Nat'l Coach of the Year, 5-Time PAC-12 Coach of the Year

I've used the fundamentals of Jack's method for my son and all of my students. And it works for everyone!

Steve Johnson

Father of Steve Johnson, who ranked as high as ATP #12 and was an NCAA Champ in '11-12 and holds the record for longest NCAA match winning streak (72-0)

Jack's System has already changed the sport of tennis forever...at least for me and hundreds of my students!

Beyond Tennis will provide you with a real clarity as to what’s going on at the elite levels of our sport. It will also provide you with the insights to develop your game to its fullest potential.

I have personally trained and coached over a hundred sectionally and nationally ranked juniors, three national champions and top 20 ATP professional Sam Querrey. I have heard it all from all the so-called “experts” in tennis, USPTA and USTA alike. I have used the principles in the Nonlinear System for most of my career, and believe me NO ONE has been able to break down the inner workings of the effortless, nonlinear game better than Jack.

My year-round tennis academy in Encino, California uses the Nonlinear System as the backbone of our daily teaching curriculum and our results are mind-blowing.

You won’t hear hack clichés like “unit turn, load and explode, move your feet” or “racket back early.” Rather, you learn what’s really going on with the strokes, anticipation and court mobility in today’s world of nonlinear and effortless style of play. You will immediately gain more confidence and a better understanding of what is going on at the highest level of the game.

Tim Schainble

Coach of Sam Querrey, who ranked as high as ATP #12

I have a very large summer staff (25+ instructors) I take the instructors through Jack’s System. There is no doubt the System works! You can see it in the hundreds of kids in our program, playing effortless, graceful nonlinear tennis! We also have a few state championships to back that up.

Todd Dissly

Los Gatos, CA, HS Coach of the Year

Jack's invention, the Swivels are the best tennis training device I've ever seen!

Nick Bollettieri

Founder of IMG Tennis Academy

I'm Jack Broudy.
Founder of the Non-Linear System.

The Non-Linear System helps players unlock their natural athleticism to not only become great players, but beautiful players. It doesn't just work on people with "talent." No. That's what sets it apart. Through projective geometry, we've taken absolute beginners to the greatest heights of the game:
✅ 2 ATP Top 25s
✅ Win over Novak Djokovic
✅ 1 WTA Top 4
✅ 1 WTA Top 50
✅ 4 US Junior #1s
✅ 3 NCAA Champions
✅ Orange Bowl Champion
✅ National Clay Champion
✅ Kalamazoo Finalist
✅ And many more
Over the last 20+ years, I've been blessed with the opportunity to share the Non-Linear System 1000s of players and 100s of coaches. Through the Non-Linear System, I aim to grow the sport of tennis by making it a more fun and enjoyable sport that is easy to learn. Through this book, I hope to transform your game next.
Get my digital copy now!
Jack Broudy giving tennis lessons tennis competition winner

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