Sir Alex Ferguson is number 1 in 90min's Top 50 Great Managers of All Time series.
Sir Alex Ferguson built three legendary Manchester United teams and a handful of other great ones during his 27 years at the club, winning trophies at an unprecedented rate and making it impossible for anyone to come close to filling his shoes in the years since his 2013 retirement.
The Scot saw countless world class players come and go, some home grown, some bought for peanuts and some arriving as record transfers.
It would have been possible to create two incredible teams from players Ferguson has managed, and the likes of David Beckham, Peter Schmeichel, Ruud van Nistelrooy, Jaap Stam, Andrew Cole, Mark Hughes, Steve Bruce, Patrice Evra and plenty of other legends miss out.