With an Angus Bell try six minutes after the final hooter, the Wallabies' 28-24 win over the Pumas in tropical Queensland left them just one point shy of leading New Zealand and with a rare chance to push for the Southern Hemisphere trophy.
Home media dined out on the Wallabies' courage to go for a winning try, while coach Joe Schmidt said he would back his on-field leaders to go for broke again.
"The mindset was very much driven by the leaders on the field at the time," Schmidt told reporters on Thursday.
"I loved the fact that they grabbed it by the scruff of the neck, made the decision and went with it.
"Part of it is having the confidence to go for it and part of it is having the competence to deliver it."
With the Wallabies beating the British & Irish Lions in the third test of their series in Sydney, then upsetting South Africa at Ellis Park, home fans are the most excited in years.
A sold-out crowd will turn up to the afternoon clash at Sydney Football Stadium (SFS) hoping the hosts can keep the good times rolling before the All Blacks face South Africa in Wellington in the evening.
Tane Edmed, a regular at the SFS with his former Super Rugby team New South Wales, will soak up the moment when he wears the coveted number 10 jersey for the first time, replacing the injured Tom Lynagh.
Schmidt said he was too nervous to declare his team genuine trophy contenders and hoped the players were also on edge.
"I'd like to think they're feeling a little bit nervous because that edge is something we're going to need," he said.
"While I'm nervous, I'm also buoyed by the fact that the team has come as far as they've come in a relatively short space of time.
"Where we are the moment, we're very conscious of Argentina being right behind us in those world rankings. And they could get past us if they beat us on the weekend."
Australia are sixth in world rankings, one ahead of Argentina.
Both nations are desperate to finish the season in the top six as it secures a more favourable draw for the 2027 World Cup in Australia.
Argentina were stinging after giving up a big lead in Townsville but coach Felipe Contepomi said his players had moved on quickly from the defeat.
"We try to always reset to zero at the start of the week, no matter the result that came before," he told reporters.
"But the squad is in good spirits."
Fourth in the Rugby Championship standings but level with South Africa on five points, Argentina need at least a bonus point in defeat to stay alive.
Dropping Pablo Matera to the bench, Contepomi has brought in winger Rodrigo Isgro and promoted lock Guido Petti while largely keeping faith in his starting 15 from Townsville.
Julian Montoya will savour his 50th test as captain, one short of the Argentina record held by fellow hooker Agustin Creevy, who retired from the Pumas last year.
"Of course, Agustin was a big part of my career and I learned a lot from him," Montoya said.
"He made me a better (player) so I am very grateful for that."