A gambler who placed a total of £25,500 on Greece to win the Euro 2004 football championships at a betting shop in Surrey has scooped £332,000.
The first bet of £4,000 was placed in the bookmaker's Woking branch in June, when Greece were rank outsiders.
The 34-year-old man collected his winnings from William Hill following Greece's 1-0 victory over Portugal.
Spokesman Graham Sharpe said it was "one of the biggest winning bets in football betting history".
He said the lucky gambler was a Burmese man who worked in the restaurant trade.
Mr Sharpe told BBC News Online that the man had said he had been unable to sleep on Sunday night because he had been "so excited".
"But it had been a narrow escape, as he had been thinking about backing England," he said.
More than £350m was gambled on the outcome of the Euro 2004 event in total, making it the biggest ever sports betting tournament.
Mr Sharpe said William Hill took over £60m on the championship.