I'm not saying he won't have to do dirty work, but the majority of the dirty work will be done by Matic. And as I've said before, watching him at Arsenal when he did play in that deeper CM role he isn't as bad defensively as some are trying to make out. He was competent enough then, and that was next to a certain Alex Song who bombed forward a lot. Cesc can do an adequate job just like Modric does for example. PS: why do you sound so angry?