Fifa president Sepp Blatter: "Just heard Sir Alex Ferguson is retiring at end of season. His achievements in the game place him without doubt as one of the ‘greats’.”

Prime Minister David Cameron says: "Sir Alex Ferguson’s achievement at Manchester United has been exceptional. Hopefully his retirement will make life a little easier for my team Aston Villa.”

Former Manchester United striker Michael Owen; "It’s just not sinking in! Manchester United with no Sir Alex just doesn’t feel right. What a man and great that it has ended on his terms. What a privilege to have played under arguably the best manager the world has ever seen. His record will surely never be eclipsed. Simply astonishing to read through his managerial record of achievements.” Chelsea pay tribute to Sir Alex Ferguson, saying, "All at Chelsea would like to wish Sir Alex Ferguson the very best in his retirement. He has been a fantastic adversary over 26 years.”

Former Manchester United midfielder and current Blackpool boss Paul Ince said: I’m totally shocked. What’s he’s done in unbelievable. You’ll never see anyone of his kind again.

"Two weeks ago he was talking about staying on for another two years, so it’s a massive, massive shock. The way he treated me was like a son.” David Beckham said, "The impact that he has with the team and the impact that he has with the players and fans - I don’t think there is anyone around in football that has had that impact ever. Manchester City Captain Vincent Kompany, "Sir Alex, one of the best managers of all time. After 26 years of success in the game, we all owe him a tribute.”

Agencies