| 摘要 |
A tennis training aid comprising a tennis ball having a pair of figure eight panels combining to cover the entire outer surface of the ball. The panels are colored of contrasting colors for indicating the spin or rotation of the ball while in flight wherein the spin imparted to the ball is easily discernible so as to enable a viewer of the ball to determine what type of spin has been imparted to the ball to facilitate learning delivery or receiving maneuvers enabling tennis participants to more effectively participate in the sport of tennis.
|
