Sir Alex Ferguson was one of the greatest managers to grace the stadiums of the world. He announced his retirement as manager of Manchester United in 2013 after 27 years in the role. He went out in a blaze of glory, with United winning the Premier League for the 13th time and he is widely considered to be the greatest manager in the history of English football. A constant element has been the quality of Alex Ferguson's league-winning squads and United's...