Well,I am no expert about the pressure his service action is putting on his shoulder.I know that in baseball,lefties usually don't throw as hard(generally)as righties.Nadal's serve is nowhere near as fast as the lefty Lurch from Croatia(he won wimbledon,but his career was soon over due to shoulder problems.)If Nadal's serve was real fast,then it would be a greater concern.Let's hope it doesn't happen,cuz he is a fantastic competitor.You can see why he doesn't lose much(he can't stand it.)
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