The Big Four have shown their vulnerabilities, but, for now, we should hold off on saying there's a wholesale change at the top of the men's game.
Rafael Nadal's US Open victory means Roger Federer and Pete Sampras should watch out.
For Djokovic, Nadal and Murray, US Open title means 2013 bragging rights.
Novak Djokovic won his third Slam of 2011, and could sweep all four next year.
Novak Djokovic has the old guard on the run, and there's nothing to suggest that'll change.
Novak Djokovic-Roger Federer should be a fascinating mind game Saturday.
Rafa beats Roger. Roger beats Novak (well, every now and then). Novak beats Rafa. That's the way they've played lately. Something's gotta give at the U.S. Open.
This U.S. Open emphasized that men's tennis is now Rafael Nadal and the rest.
Best of all time? If Rafa Nadal completes career Grand Slam at 24, he has a case.
Novak Djokovic and Mikhail Youzhny look to play spoilers at U.S. Open.