1. Etiquette

The United States Tennis Association (USTA) provides an extensive guide to the unwritten rules of tennis known as The Code. Below are some you should be aware of:

• Respect and courtesy is expected. Players should always shake hands at the beginning and end of the game.
• Players are expected to be honest. If they are unsure about a line call, they should call the shot in. An opponent always gets the benefit of doubt.
• The pace of play is controlled by the server. The receiver should be aware of this and if not ready, should make no effort to return the serve.
• The score is to be announced by the server.
• A player should avoid making any form of loud noises, such as grunting.
• At each changeover, a player sits in their designated area and refrains from bothering his opponents.
• Spectators are expected to be polite and courteous and not talk or cheer during game play. Spectators also do not get involve with making calls.

For the official document of The Code click the following link to read all of the unwritten rules and guide to fair play of tennis: https://www.usta.com/content/dam/usta/pdfs/2015_Code.pdf