The opening batsman's 103 in the champions 215-run Super Eights thrashing of fellow semi-finalists New Zealand saw him equal the record of three hundreds at a World Cup held jointly by Australia's Mark Waugh and India's Sourav Ganguly.
It was also the 35-year-old Queensland left-hander's fifth hundred in 21 one-day international innings after he was dropped for the Champions Trophy in India in October and November, a run that included his Australia record 181 not out against New Zealand in Hamilton in February.
Hayden, this World Cup's leading run-scorer with 580 at an average of 82.85 and an all-time Australian tournament best of 158 against Wednesday's semi-final opponents South Africa in a group match in St Kitts last month, is renowned for his methodical approach.
This will even extend to walking out onto the pitch in his socks the day before a game to get used to his surroundings.
"There's no replacing hard work," said Hayden. "I had a bit of a boost going to New Zealand before this competition, on similar wickets."
However, he insisted his approach was common throughout the Australia squad.
"There's not one bloke that's not doing as much work as the other. It's not just me in this scenario, I've enjoyed great partnerships along the way," explained Hayden.
The opener put on 137 for the second wicket against New Zealand in Grenada with captain Ricky Ponting on Friday during the biggest defeat suffered by a Test side at a World Cup.
"We've worked very hard throughout the (southern) summer on our one-day game and all elements of our game," added Hayden.
"It's no surprise that we are here at a World Cup at the height of our games. We are looking forward now to the next two games. All of what we've been able to achieve means nothing if we don't go all the way.
"Day in, day out, this side just desperately wants to complete its skills and give itself every chance to play good cricket.
"That's the discipline of training, the discipline of what we've been able to achieve over the last seven weeks. More than anything this side loves big games and big occasions."
And Ponting said Hayden's way was typical of an Australia side chasing an unprecedented third straight World Cup title.
"It's a very motivated team, with a lot of champion players and you don't have to motivate champion players," said Ponting.
"It's no coincidence Matty got a hundred. He batted for probably two hours in the nets the day before."