Tennis is one of the ball sports. The effective tennis court is a rectangle .There is a net in the middle, each side of the game occupies one side of the court, and the players hit the ball with a tennis racket.

Tennis rules for singles matches include the following.

1. The server and the receiver

Players should stand on opposite sides of the net. The player who serves first is called the server and the other is called the receiver.

2. The choice of venue and serving.

The choice of venue and the right to be the server or receiver in the first inning is determined by a coin toss. The winner of the toss can choose or ask his opponent to choose.

3. Serve.

Before starting the serve, the player should stand with both feet behind the baseline (ie, on the side away from the net), within the assumed extension of the center mark and the sideline. The server then throws the ball in any direction in the air with the hands and hits the ball with the racket before it hits the ground. The entire transmission is considered complete at the moment the racket makes contact with the ball. A player who can only use one arm can throw with his racket.

4. Foot mistake.

The server should not change his position by walking or running during the entire delivery of the serve, and is not considered to have "walked or moved" if the server moves slightly without substantially affecting his original stance. moved and changed his position". The server's feet shall not touch anywhere other than the area behind the baseline and between the assumed extension of the center mark.

5. The procedure of serving.

When serving, the serving player should start from the right area of ​​the court in each game, and after winning (lack) a point, he should switch to the left area to serve. If the serve is sent from the wrong half and goes undetected, any game result caused by the wrong serve will be valid. But this incorrect position should be corrected as soon as it is discovered. The delivered ball should fly over the net, touch the ground in the diagonal teeing area before the receiver returns, or land on any of the boundaries that make up the teeing area.