Are you talking about when Maguire dove in like a U10 player and gave his man a free run at goal? Or when he tried to keep up with his man and ended pulling both of his arms to stop him from getting away? Maguire just doesn't read the game very well, has no pace, and gets turned easily. I would have liked to have seen Lindelof paired with Varane but that will probably never happen. The problem with our CB pairing was not having someone who would attack high balls and command the box - Varane now does that. I'm not here to pile on Maguire, we needed a CB and we got a good one, but getting the pairing right is the real trick. Maguire + Lindelof wasn't magic, and Maguire + Varane isn't either. This is probably an unpopular/daft opinion but I think the Varane + Lindelof pairing would work better.
Hope I'm wrong!