Here we look at some of the greatest shocks in the competition's history.

1967: QPR 3 West Brom 2, final QPR of the old Third Division looked out of the Wembley final at 2-0 down, but Alec Stock's side roared back into the match and goals from Roger Morgan, Rodney Marsh and Mark Lazarus brought them a famous victory.

1969: Swindon 3 Arsenal 1, final The 1969 final provided perhaps the competition's greatest upset. Division Three side Swindon shocked mighty Arsenal, two years before the Gunners did a league and cup double, with winger Don Rogers scoring twice in extra-time to secure a 3-1 victory.

1989: Scarborough 3 Chelsea 2 (Scarborough won 4-3 on aggregate), second round Drawn to face Chelsea in round two, Scarborough were given little chance, having barely been a league club for two years. Having drawn the first leg 1-1 at Stamford Bridge, Boro hit back from 2-0 down on the night at the McCain Stadium with three goals in seven minutes capped by Martin Russell's winning penalty to seal a famous win.

1989: Oldham 3 Arsenal 1, third round Arsenal were felled 3-1 by Joe Royle's Oldham, who had already beaten Leeds and Scarborough (7-0). The Boundary Park plastic pitch may have been a factor as George Graham's league champions came unstuck against a side who would go on to beat West Ham 6-0 in one leg of their semi-final, en route to the final and a 1-0 defeat to Nottingham Forest.

1995: Manchester United 0 York 3 (York won 4-3 on aggregate), second round David Beckham, Ryan Giggs, Lee Sharpe and Brian McClair - not to mention Alex Ferguson - all had egg on their face at Old Trafford as Paul Barnes struck twice and Tony Barras headed a third, and a second-leg 3-1 win for United at Bootham Crescent was not enough to turn the tie around.

2001: Liverpool 1 Grimsby 2, third round After a goalless 90 minutes Gary McAllister put Liverpool ahead in the ninth minute of extra-time but Marlon Broomes and then Phil Jevons, in the final minute, knocked out the holders.

2006: Southend 1 Manchester United 0, fourth round Sir Alex Ferguson fielded a strong side including Wayne Rooney and Cristiano Ronaldo at Roots Hall, but Freddy Eastwood's 30-yard free-kick won it for the Shrimpers.