His mind is his most essential tool. He uses it to sculpt, discipline, and control his body.
His mind is his center.
How does he do it?--------
He has no wasted motion and no excess baggage in his game or his frame. He looks more fit now than ever, something I didn't see as possible since he's been at this level for a while now. At the same time, he doesn't go into mental collapse during a match. His opponents see this and can't believe it, often making them feel hopeless as he grinds them down. Thus, the Roddick claim that first he goes after your legs and then your soul.