No, I don't mean the manager, though that might well be the first move. Their defence, which includes the fabled De Gea, has let in more goals so far this season than all but five Premiership teams - and one of them ISN'T Newcastle. This must be a real headache for the defenders and especially their agents. Who is going to buy defenders from Manchester United, when they are no good and will presumably be on wages too high for other clubs? This leads, like the Worm Ouroburos (which swallows its own tail) to a problem for Manchester United, who have to keep on playing these defenders or pay even sillier money to replace them. Not so long ago they would have had youth team members ready to step up but maybe they just join Salford City straight from school these days. It's not all over yet - but it is very satisfying (no, I am not a City supporter and can't even speak Spanish).
Edit: Knowing my luck - and Mike Ashley - I bet the first move will be for Newcastle's Lascelles.