You can’t talk about sports etiquette without talking about good sportsmanship.

Three things are important: safety, knowing the rules and being respectful of other players.  Here are a few other valuable guidelines:

1.  Arrive on time
2. Dress properly
3. If you are the host, make sure everything is ready
4. If you are the guest make sure you arrive ready to play
5. If you don’t own equipment, rent it –don’t borrow it
6. Know the rules of the game
7. Start and end with a handshake
8. Don’t brag if you are an excellent player.  No one likes a bragger and your performance will speak for itself
9. Unless you want to be crowned jerk of the year, leave your bad temper at home.  There is no excuse for swearing, throwing a tantrum or your racket
10. Don’t be a sore loser, but at the same time, if you are the winner, be a gracious winner.  Be modest, compliment your opponent and thank him/her for playing 
11. Regardless of the sport, treat the sports ground as if it was your own backyard.  Pick up any litter, broken tees, stretch the net after a game, return equipment and so on

Louise, The Etiquette Lady