Grace, speed, strategy. These are all qualities required by one of the most sophisticated sports – Tennis. The Tennis challenge is played on a rectangular court. There are two rivals which try to defeat each other. Each player uses a racket that is strung with cord to strike a rubber ball into the opponent’s court. The object of the game is to pass the ball into the opponent’s court in such a way that he cannot make a valid return. If the opponent returns the ball outside the court or fails to return it, a point is scored.Read the rules!