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Steven Gerrard helped sink United in 2009 | ANDREW YATES/Getty Images
In 2009, Sir Alex Ferguson famously described Manchester United vs Liverpool as the biggest club game in world football.
And you can t really argue with Sir Alex Ferguson, can you?
Heading into the meeting between the sides in March that year, there was a lot of pressure on the biggest club game in world football, but Liverpool weren t really given a chance.
Perhaps rightly not, given that United had won the Premier League for the past two seasons and boasted a squad that featured Cristiano Ronaldo, Ryan Giggs, Rio Ferdinand, Wayne Rooney, Patrice Evra and Nemanja Vidic, all at the absolute peak of their powers.
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It says everything you need to know about the ferocity of the rivalry between Manchester United and Liverpool that even though the two sides have very rarely been on an even keel, it has never lost its edge.
There is usually a clear favourite - whether it s Shankly s Liverpool or Ferguson s United - but whenever the two sides meet, there is a level of bitterness in the air that usually supersedes the surrounding circumstances.
When Liverpool face Manchester United, the derby takes precedence to everything else, and here are six historic clashes which best summarise English football s crown jewel.