Tennis Feeling the racket in your hands, the wind on your face. You believe you can do it. You see your teammates cheering and you give it all you got. Tennis is a sport of cooperation, good attitude, and friendship. The game requires strength, focus, skills, and sportsmanship.
Sportsmanship means one who plays fairly and wins or loses gracefully.
Personally, I think it is easy to be a good sport about losing a game if you keep your bad feelings to yourself, and let the bad ones out. It really makes them happy and raises their spirits. When you support them, they feel much better and want to show you their feelings. If you praise them for doing a good job, they would want to do better on the next game. You should always make them feel happy if they made a mistake in the game.