Honestly I think IF Roger is going to win this tournament he would win it regardless of what Nadal did. I'm certainly not counting my chickens before they hatch, but I don't understand why Nadal being out now dooms Roger.
And why is anyone talking about Roddick? So far he's beaten Romain Jouan, Ivo Minar and Marc Giquel. OK fine he's made the most of his draw, but it's not like he's beaten a slew of great clay court players or dangerous floaters. Had Roddick played Acasuso, Kohli or Soderling does anyone really think he'd still be in the tournament? It's not like he's hitting his opponents off the court. In every one of his matches, excluding aces, his opponent has hit more winners than him. It's just that none of them were close to being capable of bossing him around. Someone like Monfils, or Federer or Haas are.