Manchester United fans have a song about Michael Carrick, which includes the words 'hard to believe it's not Scholes'.

The lyrics are apt. In the media-driven world of modern football, Carrick is one of the most understated individuals you can find.

He didn't court publicity as a player - to his detriment some might say - and didn't go out of his way to make headlines as a manager at Middlesbrough.

When he left Boro, many wondered if he would be seen in the dugout again. Now, the lure of United has taken him to the brink of a return. He is expected to be in charge for Saturday's derby against Manchester City.

What is it about Carrick that United have found so attractive? And can he sort out the mess that has enveloped Old Trafford?