Roddick vs. Federer

Quarterfinals are underway in Miami, and the most interesting matchup is undoubtedly Roddick-Federer. It is well known among tennis fans that Roddick's history against Federer is woeful, but since Wimbledon last year Roger has seemed vulnerable. He lost to Nadal in the Australian Open and again to Murray at Indian Wells. I don't doubt he has the ability to win another major, but I think he has to overcome some mental obstacles. Murray and Nadal can beat him regularly, although Roddick still has trouble. The other quarterfinal match today is already over. Djokovic defeated Tsonga 6-3, 6-4. Tomorrow Murray will play Fernando Verdasco and Nadal will take on Juan Martin del Potro.