He'll play on day one. I was calling for them to remove him from the semis, but I've changed my mind. As long as his body is fit they should play him. I don't necessarily think that they should play him on day 3, though. Besides, if they don't play Ferrero then they will have to play Rafa on day one or else face the prospect of a Robredo-Roddick matchup
Of the three, I like Ferrero against Roddick in these conditions the best. I'm not saying that Rafa couldn't do it, but I think they should save him for doubles and a possible fifth rubber.