2. Man United 1-4 Liverpool, 2009

A nightmare for any United fan, but this was surely Liverpool’s finest performance at Old Trafford in recent history.Having slipped up in the race for the title, Rafa Benitez’s side needed a win to breathe new life into hopes of a first league title in the Premier League era.Cristiano Ronaldo put United in front from the spot early in the game, but Fernando Torres capitalised on an uncharacteristic mistake from Nemanja Vidic – who was later sent off – before Steven Gerrard’s penalty, an audacious Fabio Aurelio free-kick and Andrea Dossena’s lob over Edwin van der Sar completed the rout.Guess who won the title that year? We’ll give you a clue: it wasn’t Liverpool.