One thing to consider - because Ferguson is an idiot, he could be lying here to have people on. Who knows.
If he does miss the game - don't think it will make too much difference to United imo. van Persie can do a job on his own and Hernandez is on good form at the moment, so he will be a tricky one to watch.
I think it all depends who they play in midfield. If they play one of the old men they have, then we should be able to dominate the ball there hopefully. Who knows though...