Racket science v/s rocket science

I have been trying to find words for Roger Federer's performance as he demolished Andy Roddick's hopes in a flawless display on the Wimbledon center court. You couldnt help feeling sorry for Roddick that he had to come up against someone so damn good that he made it seem that only one guy was playing tennis while the other guy moved around the court like a ballet dancer. As I see it the tennis was racket science for one while making it seem like rocket science for the other.