I used to play a lot of tennis and then, next thing you know, same thing with tennis. That banging on the knees, the jarring, twisting motion - I couldn't do it. All of a sudden, every time I played, my knee would swell up.

Quote

“I used to play a lot of tennis and then, next thing you know, same thing with tennis. That banging on the knees, the jarring, twisting motion - I couldn't do it. All of a sudden, every time I played, my knee would swell up.”