America has dominated Tennis since Bill Tilden all the way to Sampras/Agassi.
Last year we didn't even have an American in the top 10 @ one point. Every single American has now lost at Wimbledon.
Considering we had good players like Roddick & Blake competing at the top just a few years ago, what has happened? I'm not just talking about Nadal dominating Tennis, I'm talking about the lack of really serious contenders for GSs now in general.