The two sides are the most successful in English football, and the rivalry between the two runs deep – these are the players who have played for both
Manchester United vs Liverpool is one of football's most historic rivalries and one of the longest-running of all-time.
The North West Derby is considered to be the biggest rivalry for both clubs and their supporters, so what happens when a player decides to swap Anfield for Old Trafford – and vice versa?
Goal takes a look at players who have swapped loyalties between the two clubs during the Premier League era and beyond.