Nadal has beaten him multiple times on clay. Other than that, yeah, he's pretty much unstoppable.

Would be excellent. Roger has more pure talent, but Pete's competitive nature and athletisism would even things out. *sigh* if only

Federer is hacking into the Matrix.

Seriously.

All you keep hearing is how Federer might have a tough match coming up, then he dismantles the competition.
When will people stop underestimating him?

Federer is absolutely cruising through his career. He has absolutely no consistent competition. Nadal is as close as it's gonna get for him, and that's not saying much.

Gonzales had a nice run but, has anyone really seen him play?? If you can keep him in the point for more than 4 shots, he'll get impatient and tee off for an attempted winner; and typically miss it.

The Sampras/Federer debate it in intriguing one. Federer is completely dominating. Like none have before. Even Sampras. But, Sampras had far better competition back in the day. Agassi, Chang, Courier, Muster, Becker, Kafelnikov, etc. All these players had grand slams under their belt. Only Roddick and Nadal have any slams currently.

An argument could be made that Federer won't let anyone else win; but I think that only goes so far.

Federer most likely will go down as the best ever. But I really don't think his competition is as strong (overall) as Sampras' was. I would have liked to see him play back in the mid 90's. That would have made things really interesting.

Randy Savage of Slim Jim eating contests.