A tennis training device comprises a ball, a rope, and a hollow pole, the ball being coupled with a portion of a first end of the rope, a part of the rope being in a cavity of the pole, the rope being knotted at or near the second end of the rope. The training device may be coupled with a support. A method of training various tennis shots comprises the steps of obtaining the training device; adjusting a length of a first portion of the rope which is outside the pole between an first end of the pole and the first end of the rope; holding the pole to set the ball at a selected height; and allowing a player to hit the ball with a tennis racquet. Multiple trainers may participate the training with the training devices and allow a player to practice a combination of different tennis shots.