People keep posting that "Federer was off his game today." While I mostly agree with this statement, I think we should try to pick it apart a bit more. *Why* was he off his game? What was Roddick doing to him that threw him off? One thing I noticed that Roddick executed very well early on was flattening out forehands (and, less effectively, backhands) with extreme pace to Fed's backhand. It almost seemed like if Fed didn't have enough time to line up his backhand, he had major trouble getting the ball deep or even in the court at all. The grass actually helped Andy execute this since the ball scooted through so quickly. Hewitt tried this on Federer, but he just didn't have enough firepower to really throw Federer off his rhythm. As good as Fed is, I don't think any player is invulnerable. Roddick is one of the only players I've seen start to find something like a "weakness" in Fed's game. Any other observations? I'm really curious to know if there's some consistent way to attack Federer.