Stay up to date on everything Shot Stats!

Email*


Kick logo

Attach

Attach Challenger to your racket’s strings just like a dampener. It fits every racket!

Play

Play like always. Challenger provides standard vibration dampening while weighing less than 3 dampeners.

Check

Hit a great shot? Check out stats instantly, directly from Challenger’s screen. For even quicker feedback, use the audible cue feature.

Review

View all of your data or just a particular session or match. Sync your data with video to gain even more insight about your game.

Share

Great hit? Share your data and video with other players and coaches!

Attach

Play

Check

Review

Share

Designed for You


Your racket. Your swing. Your game.


Challenger plays like a dampener and can be removed in seconds.


Connect minimal
Minimal Design

Challenger covers only 4 main strings and features a rubberized exterior with a sleek matte finish.

Connect sun
High-Visibility Display

Whether you’re playing under the sun or bright stadium lights, Challenger is easy to read. A high-contrast display is visible in any environment.

Connect touch
Touch Screen Controlled

Challenger is controlled using simple touch and motion gestures. Swipe left or right to change metrics.

Connect blue
Bluetooth Compatible

A wireless sync feature lets you stay connected using Bluetooth 4.0 technology.

Connect impact
Impact Resistant

Challenger can handle direct hits from balls, fences, shoes, or whatever else might find its way there. It stays firmly attached to your racket — until you remove it.

Connect flake
Weather Resistant

Love tennis enough to play in the worst conditions? Rain, scorching heat, blizzard, or sandstorm, Challenger doesn’t quit until you do.

Connect battery
4+ Hours Battery Life

A LiPo battery allows you to record multiple training sessions and long matches.

Connect usb
USB Friendly

Charge or sync via USB. Get new features and updates as soon as they’re released!

Connect sound
Audible Feedback

Challenger has the ability to instantly alert you when your swing doesn't meet your goals.

Know Your Game


Combine data and video for the ultimate experience.



Analyze iphone 2

Breakdown

Track individual sessions and matches

Analyze iphone 2

Breakdown

Track individual sessions and matches

Analyze speed
Racket speed

Gauge your racket head speed on ball impact for groundstrokes, overheads, and serves.


Analyze impact
Impact

View a heat map of ball impact points on your strings over time.


Analyze shots
Shots

Track your number of forehands, backhands, serves, and smashes.


Analyze speed
Racket speed

Gauge your racket head speed on ball impact for groundstrokes, overheads, and serves.


Analyze impact
Impact

View a heat map of ball impact points on your strings over time.


Analyze shots
Shots

Track your number of forehands, backhands, serves, and smashes.



Analyze iphone 1

Evolution

Your improvement over time

Analyze iphone 1

Evolution

Your improvement over time

Analyze spin
Spin

View the amount and type of spin applied.


Analyze playtime
Play Time

Track your time on court and how long you’ve actually been playing.


Analyze stringing
Strings

Log your stringing. Track the number of shots before each restringing.


Analyze spin
Spin

View the amount and type of spin applied.


Analyze playtime
Play Time

Track your time on court and how long you’ve actually been playing.


Analyze stringing
Strings

Log your stringing. Track the number of shots before each restringing.





Visualize Your Game

Bring your data to life with video

Analyze iphone video

Discover your community

Community profile

Profile

Players and coaches alike can create a profile that will store personal info, equipment info, metrics over time, and media.
Community snap

Connect

Hit a great shot? Share it! Want some advice on your swing? Ask! Challenger allows you to share your stats and videos with players and coaches all over the world.
Community map

Discover

Find your next match! Challenger helps you connect with other players in your area.
Community profile

Profile

Players and coaches alike can create a profile that will store personal info, equipment info, metrics over time, and media.
Community map

Discover

Find your next match! Challenger helps you connect with other players in your area.
Community snap

Connect

Hit a great shot? Share it! Want some advice on your swing? Ask! Challenger allows you to share your stats and videos with players and coaches all over the world.

Meet the team


We are a team of tennis lovers, innovators, and engineers.


Lavie

Lavie

Tennis Fanatic / Founder


Tennis has always been a part of Lavie’s life. After several years as a management consultant, he decided to return to the game he loves, coaching, playing and eventually founding Shot Stats. It is his dream to help innovate the game of tennis.

  • Certified Teaching Pro
  • B.S. in Computer and Electrical Engineering – University of Virginia
  • Master’s in Design, HD – University of Sydney
  • Ex-Accenture
Sergey

Sergey

Master Engineer / Founder


From electron microscopes to underwater vehicles, Sergey's got a way with all things mechanical and electrical. His technical expertise is the perfect match for Shot Stats' vision.

  • B.S. in Mechanical Engineering – Georgia Institute of Technology
  • CAD/FEA/EDA Guru
  • Muay Thai and Mountain Biking Enthusiast
Jake

Jake

Finance


Jake played on the club tennis team at Ohio State. Having worked on Wall Street and at the Golf Channel, Jake brings diverse experience and a unique perspective to Shot Stats.

  • B.S. in Business Administration, Honors Accounting and Finance – Ohio State University
  • CFA Level II Candidate
  • Sports trivia whiz
Lavie

Lavie

Tennis Fanatic / Founder


Tennis has always been a part of Lavie’s life. After several years as a management consultant, he decided to return to the game he loves, coaching, playing and eventually founding Shot Stats. It is his dream to help innovate the game of tennis.

  • Certified Teaching Pro
  • B.S. in Computer and Electrical Engineering – University of Virginia
  • Master’s in Design, HD – University of Sydney
  • Ex-Accenture
Sergey

Sergey

Master Engineer / Founder


From electron microscopes to underwater vehicles, Sergey's got a way with all things mechanical and electrical. His technical expertise is the perfect match for Shot Stats' vision.

  • B.S. in Mechanical Engineering – Georgia Institute of Technology
  • CAD/FEA/EDA Guru
  • Muay Thai and Mountain Biking Enthusiast
Jake

Jake

Finance


Jake played on the club tennis team at Ohio State. Having worked on Wall Street and at the Golf Channel, Jake brings diverse experience and a unique perspective to Shot Stats.

  • B.S. in Business Administration, Honors Accounting and Finance – Ohio State University
  • CFA Level II Candidate
  • Sports trivia whiz

watch the video

Questions?


Maybe we have some answers…


Can Challenger be used in a governed match?
A new ITF ruling allows for technology to record data during a match, although outputting data is still prohibited. Challenger includes a feature that blocks instant feedback, only letting the user sync and view post-match.
I hate it when my dampener flies off. Will this happen with Challenger?
We understand the hassle of finding a lost dampener. Challenger isn’t glued to your racket – but it may as well be. It won’t come off until you want it to.
Can Challenger replace a teaching pro?
No hardware will ever replace the experience and intuition of a human coach. We developed Challenger not to replace a teacher, but to enhance the teaching experience. We want to provide more data for analysis — with or without a coach — to illuminate technique in a way that hasn’t been accessible to most players - until now. We love tennis; it's really given us so much. We hope that Challenger and products like it can not only help us grow as players, but also help the game of tennis grow so that it can be cherished by future generations. We want this technology to help coaches teach rather than teach them how to coach.
I don’t use a dampener. What about me?
We thought long and hard about the placement of Challenger and believe that the benefits of having the device on your strings will outweigh the downsides of dampening for those who don’t prefer it. That being said we are evaluating the use of different materials that will allow players to enhance or reduce the dampening effect.
Is Challenger attached to the strings during or after stringing?
Challenger can be attached to — or removed from — any strung racket in seconds. We designed it this way to encourage transferability and sharing.
How much does Challenger weigh? Will it change the balance and swing of my racket?
One of our biggest challenges is keeping the size and weight of Challenger to a minimum. As we’re selecting optimal materials, we are not yet certain of its final weight. But we can tell you that our goal is to keep its weight between that of 2 and 3 dampeners. While any additional mass may affect swing, Challenger is placed toward the middle of the racket for minimal effect on racket balance.
Do different strings and string tensions affect Challenger?
The main metrics will work with any racket. An app will allow more experienced players to add information about their equipment, string type, and string tension to collect more accurate data. As we continue to test more racket/string/tension combinations, we’ll be able to provide even more data to suit the needs of every player. We’ll do our best to use that input data to calibrate the device for more accurate results. You can also change rackets on the fly using the app to ensure you always have the best data available.
Will using Challenger on different rackets change the resulting metrics?
Each player profile will be able to log racket and string specifications. This is not required but may produce better results. If no data is input, default settings will apply. When players switch rackets, they have the option to either change their racket/string settings or switch profiles.
Will I have direct access to my data through an API?
Yes! We believe that opening up Challenger as a platform will allow people to showcase their creativity and develop innovative new data applications.
How will the data be output?
The data, first and foremost, will be given in real units like MPH and KPH. In addition to the instant data on the device screen, a player or coach can view each metric separately or combined with one or more other metrics. For example, would you like to know where on your strings you hit most of your backhand slices? Challenger has the answer.
What about ball speed?
Since we’re using accelerometer and gyroscope data, it is not possible to directly measure ball speed. However, a large body of research considers methods of extrapolating ball speed from racket data. Although ball speed will not be available when Shot Stats Challenger launches, we will continue to research and refine these methods. If they prove useful, we will release an update to enable this functionality for everyone using Challenger.