1 of 9
Notorious prankster Karl Power is up to his old tricks again at Old Trafford leading a pre-match pitch invasion

2 of 9
Ruud van Nistelrooy tumbles under a clumsy challenge from Sami Hyypia after just five minutes and wins a penalty

3 of 9
Hyypia is shown a red card for his professional foul and Van Nistelrooy tucks home the opening goal from the spot

4 of 9
Liverpool boss Gerard Houllier looks on in despair as he is forced to rethink his gameplan so early in the game

5 of 9
Roy Keane is back in the Man Utd line-up and begins to dominate the midfield against a depleted Liverpool

6 of 9
Referee Mike Riley awards Man Utd another penalty in the second half with Van Nistelrooy again on target from 12 yards

7 of 9
David Beckham is confined to the bench after suffering from flu, but makes a second-half appearance

8 of 9
Ryan Giggs slides in to score Man Utd's third, his first Premiership goal at Old Trafford for two years

9 of 9
Ole Gunnar Solskjaer adds a fourth in injury time to seal the win and see Man Utd join Arsenal at the top o f the Premiership