Frequently Asked Questions

If you’ve got questions, we’ve got the answers. If you do not find the answer to your question anywhere on our website, please contact us and we will strive to get back with you quickly.

How can I really learn to play from the internet? And why is it better?

Most tennis lessons are glorified hitting sessions. Here you actually learn from a true, proven “system”. Not only will you see and learn new information, but you can refer to it, over and over. If you have an ipad or smartphone you can take your lessons with you to the court. Plus we show unique camera angles that will illuminate principles so they become crystal clear.
What is the science behind the methodology?

The System is based on the science of infinity; a hybrid of projective geometry and spatial dynamics. Illuminated are the parallels between the principles of these “non-linear studies” and the best and most natural players in the World and their “non-linear games”. In simpler terms the sciences we use explain the “cracking” of a whip, and how a slow non-linear motion in the beginning can produce an infinite speed, enough to break the sound barrier “crack”. Our science explains how a player consistently coils and uncoils into each stroke, creating a “pop” when hitting the ball, just like the pros.
Why is the ISOT different then all other tennis instructions on the internet or otherwise?

The ISOT is based on the Infinity Tennis System, which is a comprehensive and complete step-by-step operating system. All other tennis methods are random tips and drills, sometimes organized, sometimes not. Our system is logical because it is based on the principles of projective geometry. The Infinity Tennis System transforms players, not just improves them. And with the ITS, players continuously improve – never plateauing.
What is projective geometry? (From Wikipedia, the free encyclopedia)

In mathematics, projective geometry is the study of geometric properties that are invariant under projective transformations. This means that, compared to elementary geometry, projective geometry has a different setting, projective space, and a selective set of basic geometric concepts. – [Excerpt from Wikipedia, the free encyclopedia].
What payments methods do you accept?

We use Paypal for our check-out process. We accept MasterCard, Visa, Amex, Discover and Paypal. You do not have to have a Paypal account in order to make a purchase with your credit card.
What if I'm blind or deaf? Can I still take your online tennis lessons?

Yes. We offer each video lesson on an individual page. The normal audio that accompanies the video is in text-form located directly below each video. You can read or use a text-to-speech software to follow along.
If I am not satisfied with my product selection, can I return it for a refund?

If you are not completely satisfied with the Infinity 8-Board you can return it for a full refund within 30 days of the original purchase date. Refunds issued less any applicable freight charges. Merchandise Authorization Number Required Contact us at
Do you ship internationally?

For international orders please contact us at
What is ISOT's basic tennis philosophy?

We believe in a perfect 10 when it comes to tennis. Anyone can achieve it. No matter what kind of athlete or non-athlete a person is, he or she can take our irrefutable principles and enjoy playing an effortless and “pro-like” game.
What does your "Guarantee" really mean?

If you are not completely satisfied with both the new information you are learning, and your level of improvement, or that of your students, you will be fully refunded for your first month’s tuition. Your enrollment to the ISOT will also be immediately terminated. No questions asked. No hassles.
How often do I send in my videos?

It is best to send them in once every three months. Three months is a good time frame to see a real change in players. Watching video more than that would be too “micro-managing” and wouldn’t have the same affect with the player.
Does Jack Broudy analyze each video personally?

Is there a Certification accrediation associated with graduating the ISOT?

There will be a SOT Pro Certification Test and when passed, a certification degree. However, this is not a mandatory test, though it is available for those who want to be ISOT Certified.
What kind of video should we send in to the ISOT?

Either matches or practice is fine. However, if you or your student is a tournament player we encourage you to send in a match or at least point play if possible.
Will our videos be seen by other students?

We will ask your permission first, however we would like to use Broudy’s analysis of your video to help other ISOT students. We will not mention any names or locations, and will always try to keep the student anonymous. Generally the video is of the stroke and the faces are not necessarily too recognizable. However, use of your video analysis is completely up to you.
Do you sell customer's names and addresses to other entities?

No. We value the privacy of all our students, customers and visitors that come to our site. We do not share any personal information with any third party.