Coaches and athletes should refer to the National Governing Body Code of Conduct in tennis for their respective country. An excellent resource in the United States is the United States Tennis Association (USTA) Code of Conduct, which may be found in the USTA publication Friend at Court. General conduct may include the following:
Players make calls on their own side of the net. A player calls all shots landing on or aimed at the player's side of the net.
A ball touching any part of the line is good.
A player should not enlist the aid of a spectator in making a call.
When a ball from an adjacent court enters the playing area, any player may call a let, as soon as the player becomes aware of the ball.
The server shall announce the game score before the first point of the game and the point score before each subsequent point of the game.
Athletes and coaches need to be aware of disruptive noises on and off the court.
Be respectful to matches in play. Outside spectators should not be on the court.