Item Descriptions:
This series treats of the tennis ball at the elementary, intermediate and high levels, and takes a step-by-step method to approach the playing field, the system of play, the skills to grip the racket, hit the ball, serve the ball, receive the ball, lob the ball and smash the ball and tactics in individual game and doubles game. Additionally, all those techniques and tactics are taught by demonstration. This series claims to be the first formal audio-visual tutorial of tennis ball in China. 
Episode 4
Advanced technique and tactics of tennis
Section one  Tactics of Single
Serve-and-volley Tactics
Approach the Net
Receive-and-volley Tactics
Section Two Double Tactics
Serve-and-volley Tactics
Receiving Tactic
Familiar Ball Practice
Ten Key Points for Beginners
Common Injuries and Prevention of Tennis