Manchester United have had so many different centre-back pairings this season it's hard to keep track of them all. It's safe to say that United haven't been at their best defensively this season having already conceded 23 goals in all competitions.
A lot of fans were of the belief the team were leaking goals because of the system, with Ole Gunnar Solskjaer's trusty 4-2-3-1 formation failing to cut the mustard, yet after switching to a back three against Spurs and grabbing three much-needed points, the United boss again played a 3-5-2 against Atalanta on Tuesday night.
In all honesty, I'm actually staggered it took Solskjaer's job to be on the line for him to switch formations because some of the errors his backline have been making this
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