With 49 trophies across a 39 year career — 38 of which were won in 27 years at Manchester United — Fergie is a prime candidate for the best manager of all time. Here are some of his best quotes.
"My greatest challenge is not what's happening at the moment, my greatest challenge was knocking Liverpool right off their perch."
On winning champions league final in 1999
"I can't believe it. I can't believe it. Football. Bloody hell."
On his former players becoming managers
"It can be difficult to pinpoint who would make it as a manager. For instance, nobody here thought Mark Hughes would become a manager, never in a million years, and we all thought Bryan Robson was a certainty to be a top manager."
On Arsene Wenger
"They say he's an intelligent man, right? Speaks five languages! I've got a 15-year-old boy from the Ivory Coast who speaks five languages!"
On José Mourinho
"He was certainly full of it, calling me Boss and Big Man when we had our post-match drink after the first leg. But it would help if his greetings were accompanied by a decent glass of wine. What he gave me was paint-stripper."
On David Beckham
"David Beckham is Britain's finest striker of a football not because of God-given talent but because he practises with a relentless application that the vast majority of less gifted players wouldn't contemplate."
On Ryan Giggs
"Whether dribbling or sprinting, Ryan can leave the best defenders with twisted blood."
On Manchester city
"It's City isn't it? They're a small club with a small mentality. All they can talk about is Manchester United; they can't get away from it."
On City again
'Sometimes you have a noisy neighbour. You cannot do anything about that. They will always be noisy. You just have to get on with your life, put your television on and turn it up a bit louder. Today the players showed their form. That is the best answer of all."