There will never be a more bitter and acrimonious rivalry in the Premier League than that between Arsene Wenger and Sir Alex Ferguson.
For nearly two decades, their mutual loathing of one another and willingness to display it for public consumption made their rivalry the most compelling in world football. When Wenger arrived at Arsenal in 1996, Manchester United boss Ferguson faced the biggest threat to his side's domestic dominance and a rival who would ultimately drive him on to new heights.
Only when both had stepped down at their respective clubs - Ferguson in 2013 and Wenger five years later - could they bring themselves to publicly acknowledge a mutually held respect and admiration.
