I am curious how the world tennis ranking is done? Do they break down defensive versus offensive, how many aces a person get, backhand versus front strokes win? Grass versus clay? Or just the fact that one wins and the other person loses? I heard that the world tennis ranking is sometimes controversial too. I still would stay with KISS. If it smell like a fish, taste like a fish, it is a fish. Or the Supreme Court Justice once said about pornography, 'I know it if I see it', or something like that, when he was asked to define pornography.