I can’t help but ask the question. I like the guy and his desire is unquestionable. His will to win is almost unparalleled in his sport (perhaps Federer in a more quiet way matches him) or any other. But, isn’t that what everyone always said about Barry Bonds and Roger Clemens? I don’t know the answer and I’m not here to disparage the man’s name. He makes tennis exciting and we all know that tennis needs all the excitement possible to maintain interest in the sport. Without Nadal and Federer, the sport would be in trouble. That being said, I honestly can’t explain how a man can increase his serve speed 20% in a matter of months. How a man can run in a defensive manner for hours on end and still look ready for hours more? How a man can muscle balls into winners from awkward and bio-mechanically unsound positions? You tell me.