All physical activity carries a risk of injury, and tennis is no exception. Some players especially push their bodies hard when they play, focusing only on the next shot and defeating their competition. And when playing professionally, there's no other way to do it, as less competitive players will find themselves losing games until they learn to keep up.
Some tennis injury prevention is the responsibility of the player. It's up to the player to understand their body's limits and to condition themselves to be able to take the punishment sports deal out. But as the owner of a tennis facility, there are some things you can do yourself to help your players avoid injury.