4) Arsenal 3-1 Manchester United (Premier League 2001)
The Gunners won a comfortable victory at Highbury after a hilarious error from Fabian Barthez. The two teams were locked at 1-1 before the French international hit his goal kick straight to Thierry Henry. Another error in stoppage time then allowed Henry to add a third.
3) Manchester United 4-0 Arsenal (FA Cup 2008)
United thrashed Arsenal at Old Trafford, in a game remembered as one of the Gunners worst ever performances in Manchester. Sir Alex Ferguson even warned Nani to ease off in his attempts to humiliate their visitors, after two defenders attempted to kick him.