It doesn't matter at all. I think that things don't go like that in Italy. Their fans might prefer Milan at 3rd, but the owner and the directors will look strictly at their best interests.
Needless to say that I don't expect fair play. I fully expect both Milan and Fiorentina to negotiate with Siena. The way Siena plays on Sunday will depend solely on the offer Galliani and Della Valle make. Here I don't mean money in a bag. It's gonna be about business interests or, more probably, young players on loan or co-own.