Don't take this the wrong way but, if Tuanzebe coming back is a no-no, we'll need two centre-backs coming in.
I thought Man U were happy to send Tuanxebe out on loan to us again.
Anyway, as much as I like James Chester, he's not exactly a Dean Smith type of central defender is he, more of an old-fashioned, kick it over the stand defender.
I mean he isn't exactly blessed with pace, so tends to play deep.
As for playing out from the back, the times he's tried it he's found opposition players, or played our own into bad situations.
If we sign Mings and Hause, we'll have two who play well together in central defence,so adequate cover would be the only thing needed.
As for Cahill, its a huge no-no thanks, if only because of his age, he's got one, at the most, two seasons in his legs. Never exactly a speed merchant, he doesn't fit the style of play required by our boss for central defence.