Originally Posted by Tcbtennis
Exactly. When I watch those guys move across a court I can see their natural athleticism. When I watch John Isner all I see is a big lumbering giant with a big serve. There is nothing athletic about him. If he were a true athlete, he would be playing basketball here in the U.S. But because he realized that his long term potential in basketball was non-existent he pursued tennis. He got a lot further (Top 10) with his limited abilities than I thought he would.
You pretty much nailed it on the head Tcbtennis. He simply is what he is, a guy with limited mobility and "skills" whose size (and serve) only provided him with whatever advantages he enjoyed only up to a point.