Time for Man Utd to move for a left-back?

[Getty Images]The signing of Carlos Baleba completes a £155m summer revamp of Manchester United's midfield.At the end of last season, midfield was targeted as a priority area as United looked to build on qualification for the Champions League after a two-year absence.So, now the midfield is sorted, it is natural for fans to look at the other areas of Michael Carrick's squad that could do with reinforcements; namely left-back.There is no doubt the club like Newcastle's Lewis Hall. At 21, he