I can see where you're coming from here. It's certainly a show of faith in Smalling by Fergie in a match of this magnitude.
I'm sure he's also wrestling with his midfield and striker options, with Nani, Giggs, Park, Carrick, Fletcher, Scholes, Anderson, Berbatov and Rooney all having strong shouts for six available positions.
I really think Mancini might spring a surprise with two up front for this one, partly because he now has Dzeko, who wasn't available at Arsenal, for instance, and partly because if he has any ambition about winning the league at all, a single point wouldn't be of too much use.
By the way, where's NewtonHeathDave? Would have expected some comments on here from the lad.