Manchester United go to Liverpool today in what many are claiming to be the biggest fixture between the two clubs for a decade.
After so many seasons in the wilderness, United are three points ahead of the defending champions having played the same number of games.
In this video, we detail how the bitter rivalry between the two clubs began and developed over the years.
And while there has always been tension between the two clubs and two cities, ultimately the rivalry is driven by on field matters and trophy success.
Watch below (and for more videos click here):
