It was a shock to see the great tennis champion Roger Federer blown off the court. It hadn't happened before that I was aware of at the time, and certainly not ever in a major final, but there it was, his racquet rendered useless. His opponent in the US Open that day was simply hitting the ball past him, avoiding Federer's greatness altogether. It was an awesome display and it was clear that the great one had a legitimate challenger in Juan Martin Del Potro of Argentina, US O