"I thought that they kept their nerve very, very well. In the end, the opposition coach made a mistake by attacking them. He was 2-0 up and had he sat back with a defensive blanket of two banks of four then I think Manchester United would have found that much more difficult to break down. In the end, opening himself up let Manchester United exploit those spaces and there's nobody better to do that than Wayne Rooney and Robin van Persie.

"They took full advantage of the fact that Olympiacos thought they could come and attack United, instead of looking to protect their two-goal lead. They didn't have to score a goal to get through to the quarter-finals, all they had to do was not concede one but he never set his tactics out like that. David and his players took full advantage of that fact."