Betfair

"From a betting odds perspective, what is the most unlikely thing to have happened in football?" wondered Paul Griffiths back in 2005.
 
"The longest odds for a single result would either have been:

500-1 USA beat England 1-0 in 1950,

500-1 Hungary beat England 6-3 at Wembley in 1953

500-1 Manchester City's remarkable FA Cup fourth-round replay win at Tottenham back in 2004. Spurs led 3-0, but City – with 10 men – stormed back to win 4-3.

999-1  Back in January, Internazionale trailed Sampdoria 2-0  in the 88th minute  of their Serie A clash. "With maximum odds of 1,000 against (the equivalent of 999-1) available, the price was snapped up by a Berkshire man," says company spokesman, Tony Calvin. "Then Obafemi Martins scored in the 88th minute, before Christian Vieri and Alvaro Recoba won the game for Inter in injury time. The punter had scooped almost a grand for his £1 staked.

 Our previous high was 'only' a winning bet at 550 (549-1) on the draw, when a Cameroon side came back from 5-0 down to finish 5-5 against Portugal at the Under-17 World Championships in 2003."