Yeah, I'm a late starter too. Didn't start till I was 14, played for PSU a year then didn't touch a racket for about 4 yrs then picked it up again. My tennis is like a roller coaster ride, it's bumpy at times but all is well. I think every competing players will pick up an injury or two in their life time. Can't be avoid. Such is the joy, and pain of this lovely sport.