Football fans love the FA Cup for the huge shocks it can bring and the history of the competition is filled with them.

In tribute to the four Blue Square Bet teams who have overturned the odds to make it to the third round this season, we want your help to identify the biggest upset ever caused by a non League team.

For anyone who thinks that Fleetwood Town, Salisbury City, Tamworth and Wrexham don't have a chance, just take a look at the list below.

Tottenham Hotspur also deserve an honourable mention for winning the FA Cup as a non League side in 1901, but football was a very different game then, so the options are all post-War.

Havant & Waterlooville 4-2 Swansea City (Third round replay, 16th January 2008)

Swansea City might not have been the Premier League outfit they are today when they crashed out of the Cup to Havant & Waterlooville three years ago, but the Swans did go on to top the third tier that season and were still three divisions higher than the Hawks from the Blue Square Bet South. Shaun Gale's men incredibly went on to lead Liverpool twice at Anfield in the fourth round before the Reds finally ended their proud run with a 5-2 win.

West Bromwich Albion 2 - 4 Woking (Third round, 5th January 1991)

Woking striker Tim Buzaglo, a former Gibraltar cricketer, made the headlines after scoring a hat-trick for the then Isthmian League side as they humbled West Bromwich Albion with a convincing victory against the old Division Two side in front of 5,000 visiting fans at the Hawthorns.

Sutton United 2 - 1 Coventry City 1 (Third round, 7th January 1989)

Remembered as the last time that a non League club turfed out top flight opposition, this match saw Conference side Sutton send 1987 Cup winners Coventry packing. That was despite the Sky Blues being sixth in Division One at the time and fielding seven members of the side which beat Tottenham in the final two seasons before.

Birmingham City 1 - 2 Altrincham 2 (Third round replay, 14th January 1986)

Altrincham have a proud FA Cup record, with a long list of League victims, but their biggest achievement in the competition came against Birmingham City, featuring a young David Seaman in goal, a quarter of a century ago. If Tamworth can beat Everton at Goodison Park then they will be the first non League club to eliminate a top flight side on their own ground since the Robins did representing the Conference all those years ago.

Burnley 0 - 1 Wimbledon (Third round, 4th January 1975)

Burnley had won the Second Division title in 1972/73 and finished the following campaign as the sixth best team in the country, having also reached the FA Cup semi-final. So defeat at the hands of the Southern League's Wimbledon in January 1975 was a giantkilling feat of the highest order. Goalkeeper Dickie Guy was the hero for the visitors as Wimbledon began making a name for themselves.

Hereford United 2 - 1 Newcastle United (after extra time) (Third round replay, 5th February 1972)

One of the most famous upsets of all time, but is it the best? The Southern League side held Newcastle to a 2-2 draw at St James' Park and somehow went one better in the replay. Malcolm Macdonald put the Division One side ahead with less than ten minutes to play, but they let their lead slip as Ronnie Radford scored one of the most memorable FA Cup goals of all time before Ricky George's extra-time winner wrote Hereford's name firmly into the history books.

Worcester City 2-1 Liverpool (Third round, 15th January 1959)

Liverpool have been on the receiving end of a number of notable FA Cup defeats over the years, including the 1988 final against Wimbledon and a departure from the fifth round in 2008 at the hands of Barnsley, but their loss to Worcester City has to go down as the biggest surprise. Although it wasn't a vintage Reds side - they were in Division Two at the time -no one would have expected Southern League outfit Worcester City to eliminate them.

Yeovil Town 2-1 Sunderland (Fourth round, 29th January 1949)

This game still holds the record for Yeovil's highest home attendance and none of the 16,318 fans there to witness the match will have ever forgotten what they saw as Yeovil, of the Southern League, beat top flight opponents Sunderland. The Glovers would set another club record in the fifth round - their worst FA Cup defeat - with an 8-0 loss to Manchester United, but they can be forgiven that.