The Wallabies have vowed to take the pressure off returning duo Israel Folau and David Pocock, vice-captain Adam Ashley-Cooper declaring the team can't rely on the two stars to lift them to a World Cup semi-final triumph.
Folau (ankle) and Pocock (calf) must complete training at the team's last session on Saturday (Sunday morning AEDT) to put to bed doubts about their fitness before the clash against Argentina. 
But both have been named in Michael Cheika's team while Scott Sio (elbow) has been ruled out, allowing James Slipper to move into the starting XV and become the most capped prop in Australian rugby history.
The Wallabies only just survived a quarter-final scare against Scotland last weekend with Folau and Pocock on the sideline.
Their return is a massive shot in the arm for Australia's hopes before their match at Twickenham on Sunday (Monday morning AEDT), but Ashley-Cooper said they can't shoulder the expectation.
"It's a great boost, it's good having those guys there. They are world-class players, hence the time [coach Michael Cheika] has given them to prove their fitness," Ashley-Cooper said.
"Having those two back is definitely a boost but we can't rely on them coming back in and performing everything. We have to perform our role.
"The squad is healthy and available. That's the boost. We have relied on that depth in a couple of games, we can get a lot of confidence out of that."
Sio will stay with the squad in the hope that he will be fit for the final if Australia can beat Argentina. His injury has opened the door for Slipper to etch his name in the Wallabies' history books, passing Benn Robinson and Ben Alexander as Australia's most capped front-rower.
It comes a week after Slipper felt "sick in my stomach" after he threw an intercept pass which allowed Scotland to score and almost destroyed the Wallabies' World Cup dreams.
But Cheika is throwing his faith in Slipper to step up at loosehead prop while Sio will be given extra time to recover.
Winger Drew Mitchell has a chance to snatch a record of his own as he edges closer to the top of the World Cup try-scoring list.
Mitchell is just one behind New Zealand legend Jonah Lomu and South Africa speedster Bryan Habana.
But he is more focused on making the most of his opportunity to claim team glory.
"Regardless of whether it was Izzy or [Kurtley Beale] or Ben McCalman or Poey, we've got the belief in the group that we've got the cattle to go out there and get the job done," Mitchell said.
"This week [Pocock and Folau] along with 21 other players are getting opportunities to pull on the jersey, go out there and make the most of what is a great opportunity for us."
Australia v Argentina
Head-to-head: Played 24, Australia 18, Argentina 5, drawn 1
Last five meetings:
2015, Mendoza,
Argentina 9-34 Australia
2014, Mendoza
Argentina 21-17 Australia
2014, Gold Coast
Australia 32-25 Argentina
2013, Rosario
Argentina 17-54 Australia
2013, Perth
Australia 14-13 Argentina
Rugby World Cup meetings:
1991: Australia won 32-19, Llanelli
2003: Australia won 24-8, Sydney
Best World Cup results:
Australia: Champions 1991, 1999
Argentina: Third place 2007
Path to semi-final:
Australia:
Pool games: bt Fiji 28-13, bt Uruguay 65-3, bt England 33-13, bt Wales 15-6
Quarter-final: bt Scotland 35-34
Argentina:
Pool games: lost to New Zealand 26-16, bt Georgia 54-9, bt Tonga 45-16, bt Namibia 64-19
Quarter-final: bt Ireland 43-20
Key players:
Australia: Tevita Kuridrani is the quiet achiever of the Wallabies back line, but enjoyed his best game of the World Cup against Scotland - with his destructive straight-line running a feature as he set up the opener for Adam Ashley-Cooper and scored one of his own. Will need to aim up defensively, with Argentina adept at attacking out wide.
Argentina: Juan Martin Fernandez Lobbe is a genuine menace at the breakdown - which will be even more of a factor against an Australian team boasting the triple threat of Scott Fardy, Michael Hooper and David Pocock. But the skilful 33-year-old is also the leading tackler for Argentina at the World Cup with 46 and carries the ball well, which opens up the field for the team's dynamic back three.