JUNIOR TENNIS KINETICS™ (JTK) is SPORTIME's trademarked junior development program, dedicated to meeting the instructional and recreational needs of our Junior Tennis & Sports Members. JTK offers a complete menu of tennis programming for juniors in an environment that is safe and enriching. To ensure the highest quality of instruction, every SPORTIME tennis facility has a TK Master Professional moving from court to court to supervise and support the JTK Program.