Due to repetitive motion, there is a high percentage of overuse injuries. Those are extremely common among non-competitive (or non-professional) players and can easily be prevented with some changes to technique and training routines.
Ursula Tennis also works closely with the Quinn Orthopedic, where they integrate manual therapy, exercises and home programs designed for each individual. I recommend asking for Deborah Quinn, she has extensive knowledge in manual work and rehab exercises. She has helped me personally with my low back and neck issues.