Sir Alex Ferguson has revealed how breaking the hearts of Manchester United hopefuls was the toughest part of being the boss at Old Trafford.Fergie won a staggering 28 major trophies in 27 glorious years as United manager before retiring in 2013.But during that time he was also forced to let countless young players leave the club, after deciding they were not going to make it at United.Fergie admits he despised having to ruin the dreams of his teenagers and he said: "The process was that the youth coach and the welfare chap would come in with the player you're going to let go."Maybe he's only 17, 18 years of age.
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