People always wonder what would happen if an unstoppable force came together with an immovable object. The truth is they spent 12 years together at Manchester United.
Roy Keane and Sir Alex Ferguson brought untold success to Old Trafford, winning seven Premier League titles, four FA Cups and a Champions League between 1993 and 2005.
And the midfielder was captain of one of England's most successful ever teams for eight of those 12 years. Often cited as the link between manager and player, Keane was Ferguson's go-to man at United for so long.
And in a dressing room filled with huge egos and intimidating demeanours, the Irishman never shied away from confrontation and was crucial to keeping the elite mentality in tact.
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