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Legendary Manchester United manager Sir Alex Ferguson officially called time on his managerial career at United in May 2013.

After 26 years at the club, Ferguson left a legacy as the greatest manager in the Premier League after winning 38 trophies during his time at Old Trafford.

Before Ferguson’s official retirement five years ago, rumours of his retirement had already leaked in the press and Manchester United coach Michael Carrick who was then playing under Ferguson has revealed that the 76-year-old was ‘fuming’ with United’s inability to keep his retirement a secret.

Ferguson was forced to reveal his decision to his players that his retirement was because he wanted to spend more time with his wife Cathy following the death of her twin sister Bridget.

“I took in every detail. The boss began speaking and became quite emotional,” Carrick wrote in his new autobiography Between the Lines.

“’Look, boys, I didn’t want to do it this way. I wanted you to be the first to know. I’m really disappointed how it’s come out. I really did want to be telling you first, but I’ve been forced to tell you now because it’s come out last night. Someone’s leaked it.’”

“He was fuming about that. There couldn’t have been many people who knew.

“Sir Alex went on, ‘Look, boys, this is not something I’ve taken lightly.’

“He mentioned Lady Cathy’s sister passing away. ‘I feel that I owe it to my wife to be with her and look after her. It’s been unbelievable and thanks for everything, I’ve loved every minute. I don’t really want to go, but I’ve got to take this decision.’

“You could see it was hard for him to finally say, ‘This is it, boys.’”