Unfortunately injuries is part of the sport. Most of the athletes are suffering discomfort here and ther during their careers, sometimes just temporary, sometimes they get worse and wrist, knee and elbow discomfort is very common and not necessarily they need stop to play. Like I said before we can count only with the fingers of one hand who never has got it an injury which surprise me a lot because the continue and big effort than all of them are doing day by day, practicing and playing the tournaments and we can see that every time
Delpo, Raonic, Monfils, Tsonga, Simon, Rafa, Almagro, Murray etc etc etc but the difference is it seems that everybody is putting more attention on Rafa than on anyone else
Lucky has to do a lot with it, I see players falling very badly, twisting the ankle, ranning like crazy with every point, trying to hit the ball as hard as they can and they 'survive' until now, you never know later. I remember Monfils years ego when everybody called him 'the rubber man' incredible the jumps, running, stretching and everything he did at that time until he started to get injury by injury