Mourinho Ready to Seal $66million Star Signing for Man United

Over the past few years, Manchester United have signed more than a few players who can play in the left back position.
In the current squad, the likes of Luke Shaw, Marcos Rojo and Daley Blind can be effective and the Red Devils do not really need another left back.
However, reports in the media suggest that Mourinho is looking to sign a new left back in the form of Benfica star Alejandro Grimaldo.
According to reports (Daily Mail), Manchester United are lining up a move to sign the Primeira Liga defender who has a mammoth release clause of 51 million pounds ($66million) in his contract.
The 21-year-old defender has been effective in the attacking third for Benfica so far this season. He has provided 4 assists in 9 games (3 assists in 6 league games).
As per the provided Daily Mail link, United have scouted the talented Spanish international and it is believed that he can be lured for a reasonable transfer fee.
In your opinion, do Man United need a new left back?