Oncourt Offcourt Serve Doctor &ndash; Improve Tennis Serve/Tennis Training Aid IMPROVE YOUR SWING: Use the Serve Doctor to Give Players a Feel for The Height and Location of The Contact Point on The Serve. EASY-TO-USE: The Serve Doctor Consists of An Extension Pole with A Rope and Velcro On the End. To Attach a Ball to The Pole, Take A Tennis Ball with Moderate to Full Fuzz and Twist It onto The Velcro. WORKS WITH ANY BALL: Each Well-Constructed Unit Consists of A 3-Part Aluminum Extension Pole and Velcro System That Attaches to Any Tennis Ball. TRAINING AID: The Serve Doctor Is a Proven Training Aid for Parents and Coaches Looking to Help Beginners Improve on Such a Vital Aspect of The Game. SIMPLE: It's Simple, Effective, And Only Takes A Few Minutes to Begin Improving Your Serve. As a tennis industry leader, OnCourt Offcourt has created training aids and practice equipment that include tennis backboards, ball machines, as well as tennis balls and baskets. Our products are great for players of all skill levels and ages. We also provide great teaching tools for trainers and coaches. Pickleball is the fastest growing sport in the United States. Shocking news to many, but for those who play, this fact reinforces their passion for the very user-friendly racquet sport. OnCourt OffCourt has proudly been developing products for pickleball since 2009, when we teamed with the USAPA to develop and design the portable USAPA Pickleball Net. We have a large product catalog that includes paddles, nets, balls, and even training gear to help enhance your game. Our fitness catalog is full of products and information to help players improve. Movement, positioning and balance are keys to success in all sports. Most athletes, however, are not even aware that most of the challenges they face are a result of poor movement and balance. The good news is that movement training and balance training actually work. The training aids availible are each powerful tools for all sports and activities Our fitness catalog includes many tools that help improve balance, form, and overall play. We understand that life is busy and sometimes it can be tough to get out onto the court. OnCourt OffCourt has a great catalog of products that can be used to train anywhere. These training tools can be used in any environment; garage, driveway, backyard, and indoors. The Billie Jean King&#039;s Eye Coach was voted the industry&#039;s best at home tennis training system and is available through OnCourt Offcourt.