#3. Left back
Manchester United need to sign another left back to offer competition to Luke Shaw. The young English defender arrived from Southampton with a big reputation as one of the most promising youngsters in the division. The £30 million price tag might have been too heavy for an 18 year old and replicating the scintillating form that earned him the big money move to Manchester United as expected was going to be difficult.
Shaw's first season at Manchester United was plagued with injuries and the young English defender was down the pecking order in Jose Mourihno's first season at Manchester United. However, Luke Shaw has gained the trust of the Portuguese and is currently the first choice left back at Old Trafford and is in line for a new deal as his current contract expires in the summer.
Shaw is being deputized by Ashley Young, who is 32 years old and cannot be considered a long-term solution for Manchester United. The signing of a new left back will provide proper cover for Luke Shaw in case of an injury or fatigue due to many games in a season.