League Two minnows Macclesfield could earn £1million if they pull off a shock win in the FA Cup against Premiership champions Chelsea.

Betbrokers, who are also spending £10,000 on bussing the Silkmen's fans to Stamford Bridge, have offered Town the figure if they manage what would be one of the greatest shocks of all time, the betting brokerage having laid a £15,000 bet at odds of 66/1.

Macclesfield chairman Rob Bickerton admits the offer is a massive incentive for Paul Ince's men.

He said: ''We are definitely looking to win this game and it would be a massive bonus for the club if we could do it".

Betbrokers chairman Wayne Lochner added: ''We've built a risk-management product that allows Macclesfield not only to enjoy being able to beat a team as good as Chelsea but also to see significant financial returns, all within the spirit of the Football Association.

''I think they've got a slightly better chance than 66/1. If Southend can beat Manchester United, Macclesfield are in with a shout".

Should Macclesfield win at Stamford Bridge, it would rank alongside some of the greatest sporting upsets of all time.

Chelsea are 1/14 to win, 7/1 to get a draw and 25-1 (66-1 prior to the bet) to lose.

Below is a list of some of the weirdest and most unlikely sports bets of all time.

In 1995, an anonymous woman from Nottingham secured odds of well over 3,000,000/1 when her bet of 5p on an accumulator came in paying out at £153,644.40.

A 51-year-old hotel worker became the biggest ever betting shop winner when he bagged a staggering £878,939 on the totesport Scoop6 for a 4 pound stake.

He arrived at the Esher course in search of the further £983,495 available if he could successfully predict the winner of the bonus race, the Betfred Gold Cup but failed.

In 1992, Wrexham defeated the league champions Arsenal in the Third Round, Wrexham having finished bottom of the Football League the previous season. Arsenal took the lead in the game through Alan Smith but Wrexham stormed back to send the Gunners crashing at the Racecourse Ground at odds of 25/1.

Bangladesh pulled off what may be the greatest shock ever in cricket with a five-wicket victory over world champions Australia in a One Day International in Cardiff in 2005.

The Tigers were aided by a magnificent century by Mohammad Ashraful and surpassed Australia's 249 for 5 with four balls to spare for a victory that was priced at a massive 20/1 before the game.

When Mike Tyson took on James Douglas there was no one who gave Douglas a chance of winning back in 1990.

Douglas was a 42/1 outsider while Tyson was at 1/200 to defend his title - an unbelievable price and one that cost several punters a hefty sum.

Tyson's left eye began to swell in the fifth round and in the ninth round, his eye closed completely until the final assault in the 10th round where boxing's greatest ever shock was completed.

In 2005, Sean Murphy became the first qualifier to win the World Snooker Championship at The Crucible since Terry Griffiths in 1979.

Murphy was a 150/1 shot at the beginning of the Championship but beat a host of stars, including John Higgins and Peter Ebdon, before defeating Matthew Stevens 18-16 in the final.