Jamie Roberts has warned his Wales team-mates that Australia will fight back like a 'wounded animal' in Cardiff.
The Wallabies suffered a shock 9-8 defeat to Andy Robinson's Scotland at Murrayfield.But British Lions star centre, who fractured his skull in a clash with Stirling Mortlock in last season's 21-18 triumph, admits he expects another battle royale next Saturday.
Roberts, 23, said: "It was a huge win for Scottish rugby and the weather conditions suited them down to the ground. But that result will make it tougher for us. It's always harder to play a side who have just lost.
"Australia will come here like a wounded animal and play with extra fire. It's a challenge we are looking forward to."
After a Shane Williams-inspired 33-16 win over Argentina, head coach Warren Gatland has also admitted his side need to raise their game for the showdown with Robbie Deans' men at the Millennium Stadium.
Gatland said: "We will definitely have to step up a level next week. Last year we beat Australia and we deserved the victory. But, having dealt with Australians before, I know they will be smarting from that defeat. It will make them even more determined to win.
"It will be nice to show another level of work in training and in our performance next weekend to make sure we improve from game to game."
When the Wales squad were asked to nominate individuals who played a big part in their early playing days, Wales and Dragons full back and wing Hallam Amos thought of his former Monmouth School rugby coach John Bevan.
Sam Cross and Luke Treharne have been named as co-captains of the Wales Sevens side as head coach Gareth Williams names his 12-man squad to play in the first leg of the HSBC World Series in Dubai next weekend.
Bedwas head coach Steve Law and players Nicky Griffiths and Alun Rees extol the virtues of the close knit club as they prepare to host third place RGC 1404 - who are one place head of them on the Principality Premiership points table - on Saturday.
Many of the Wales squad have said Diolch (thank you) to someone who played an important part in their early playing days by nominating them to be invited to the Wales v South Africa match. One person, Gowerton Comprehensive geography teacher Mr Dean Mason was nominated by two of his former pupils, Dan Biggar and Sam Davies.
The second WRU disability rugby pilot has been delivered, this time in Caerphilly schools, culminating in a festival at the Caerphilly Centre of Sporting Excellence, Ystrad Mynach tomorrow. Plans are in place to set up a Disability Rugby Club in Newbridge to provide long-term playing opportunities.
WRU TV: Hear from inside the Wales camp as Neil Jenkins discusses this weekend's clash with South Africa and how the squad are looking to put in a strong performance to round of the 2016 Under Armour Series