It does happen once in a while. Even the best of callers, the most honest citizens, the one who gives the call to his opponent if there is ever a doubt ... will be called a cheater or insinuated to be one. Toughen up. Thicken the skin. Stay calm.
If you are uncertain of your call, give your opponent the point. If you are 100 percent sure of your call, stand your ground and keep your mouth shut. Don't say anything you might regret later on. It's part of the game.
Some people will lose their cool and start shouting or saying things that they will regret. It's not like you will never run into this person again. He might be your standing singles opponent on a seasonally rented indoor court for 32 weeks. Or, he might be from a different school or college and you think you will never run into him again. You will. Keep your mouth shut, play hard and shake hands when it is over. Give him a chance to apologize when he is ready. Don't push him. If it happens repeatedly, that's something else. If you're sure of your call, stand your ground and keep your mouth shut.
For more tips, visit Joel's Tips Page.