They are two of the biggest rivals in English football, but when Manchester United and Leeds United met at Old Trafford in the third round proper in 2010, there were two divisions and 42 league places between the clubs.
Sir Alex Ferguson's side were perennial challengers in the Premier League, whilst Leeds were fighting for promotion from League One, so anything other than a home win would be a shock.
Manchester United 0-1 Leeds United
The FA Cup
Third Round Proper
Sunday 3 January 2010
Old Trafford, Manchester
But Simon Grayson's side matched their hosts throughout and completed one of the more memorable recent upsets when striker Jermaine Beckford broke free of the United defence to slot a low shot past Tomas Kuszczak.
Watch the goal in the video player below.
Emirates FA Cup third round classic goals: Jermaine Beckford