Twelve years on, the memories are a little hazy. "I can remember only that I got (Adam) Gilchrist out," says Mashrafe Mortaza. "That's what I can remember."

Yet it is the details of Bangladesh's victory over Australia in Cardiff in 2005 that give the story its true gravitas. Mortaza dismissed with the second ball of the match. Bangladesh had won just two of their 77 completed ODIs against the top eight countries up to that point. Their centurion that day, Mohammad Ashraful, went into the game with an average of 16. London bookmakers offered odds of up to 500-1 on a Bangladeshi victory.

The detail that everyone remembers, of course, was that Andrew Symonds was missing, left off the Australian team sheet at the last minute after management realised he was still under the influence of alcohol. Symonds was one of eight Australians to celebrate Shane Watson's 24th birthday over dinner the previous evening, but the only one to take those celebrations through the night.

When Australia posted 249 for 5, with Simon Katich scoring 36 not out from 23 balls in Symonds's place, it looked as though it would not matter. When Bangladesh reached the halfway point of their chase on 81 for 3, there was no inkling that one of the greatest upsets in cricket history was on the cards.

Bangladesh's batting had been prone to falling apart at the seams in such situations, yet somehow it kept its cool. "A personal battle" was how coach Dav Whatmore described it afterwards. "We were very, very keen not to panic."

With four fifties to his name - three of them against top opposition - Ashraful had shown the talent that he possessed. But a top score of 66 confirmed that he was known to throw his wicket away as well. On that day in Cardiff, he made a name for himself by casually flat-batting Glenn McGrath over mid-off for four to bring up his half-century - an act of impressive defiance from a diminutive batsman against a tall, legendary fast bowler. A 130-run partnership for the fourth wicket with captain Habibul Bashar showed an unexpected maturity.

Even when it was ended, Bangladesh needed 48 from 37 balls, and few people gave them a chance. Ashraful took them closer as he went on to three figures from exactly 100 deliveries, before kneeling down to kiss the Sophia Gardens pitch. When he was caught at long-on from the very next ball, the dream looked to be over.

But Aftab Ahmed and Mohammad Rafique took the equation down to seven runs required from the final over, which began with Aftab smashing Jason Gillespie over long-on for six. A hurried single finished the job with four deliveries to spare. "Attempts to keep joyful fans off the field were no more successful than Australia's to hold back Bangladesh's batsmen," reported Wisden.

"I am probably the happiest man in the world today," Bashar said afterwards. Asked how the team intended to celebrate, a smiling Whatmore said: "I had planned a little training session for the reserves with the view of making one change before the next match - and I still think that will happen. But I'm not going to worry about that tonight."

Twelve years later, it remains Bangladesh's only ODI success over Australia in their 19 attempts. Mortaza was just 21 years old on that day, and is the only surviving member from the Bangladeshi side. His team have come to know the feeling of winning like in recent years, but not what beating Australia might be like.

Australia go into Monday's Champions Trophy clash at The Oval as the reigning world champions - as they did in Cardiff in 2005. They have not been as rampant recently as they were back then - and Bangladesh have made almost immeasurable progress - but they will still be strong favourites for a game that neither side can afford to lose.

Asked about that famous day, Mashrafe said: "Cardiff is 12 years back. Obviously tomorrow is a new day." But he also admitted that it is a "great memory".

If Bangladesh were to pull off another upset, it would no longer be seen as one of the great ODI shocks. But it would be another step up in their development, and a chance for the current team to pass on golden memories to the next generation.