Liverpool legend Jamie Carragher believes one of Manchester United's problems this season is a lack of leg speed.
Carra wrote in the Daily Mail: "I'd go as far as to say this is the slowest United side I have seen and in Piraeus they looked like a team of old men coming to the end. Facing United used to be unnerving, as you never knew how they would play.
"If they wanted to pass you to sleep, they would do it without a problem. But if they wanted to pick you off on the break, they had the speed and cutting edge to shred you to pieces. The two signings of Juan Mata and Marouane Fellaini won't change that, as they don't have pace."
