Wallabies prop Benn Robinson expects South Africa's forward pack to come out looking for redemption in Saturday's Tri Nations clash in Perth.

Australia dominated at scrum time during the second half of the Springboks' 29-17 win in Cape Town earlier this month.

Robinson said Australia's front row could ill afford to rest on their laurels and would be on guard for a bitter backlash from South Africa when the two teams meet at Subiaco Oval.

"They'll come back looking at that game and come back firing," Robinson said on Tuesday.

"You've got players there like (John) Smit who have played 70-odd Test matches so he's got plenty of experience.

"And you've got the Beast (Tendai Mtawarira) at loosehead as well.

"They've got a very experienced front row so we can't take that for granted.

"You are only as good as your last scrum.

"You look at the South African scrum of the past years, they're such a powerful team and powerful pack.

"They easily step up after tough times.

"No doubt they will definitely be on their game this weekend and looking to cause some damage to us."

Wallabies prop Al Baxter has been heavily penalised at scrum time during the Tri Nations series and is in danger of losing his starting spot to Ben Alexander, who has impressed during his stints off the bench.

But Robinson backed Baxter to once again prove his critics wrong.

"I suppose there's always going to be different interpretations from different referees," he said.

"Al's been around long enough and is experienced enough to adapt his game.

"If they are picking up on issues on Al he will change it but at the moment I still rate Al as one of the best tightheads to pack against."

Alexander said Australia's scrum dominance in South Africa would count for little ahead of the latest bout.

"To be the best side you've got to be good every day and to gain that consistency you have to do it over a long period of time and that only comes with lots of games," Alexander said.

"They've got one of the best scrums in the world so it's going to be tough."

Meanwhile, No.8 Richard Brown admitted he had to improve his discipline after being sin binned twice in as many Tests.

"He (coach Robbie Deans) has told me to move on basically and put it at the back of my mind," Brown said.

"I'll still be conscious that they (the yellow cards) are there and be more aware of what part of the field we are in when I'm going about my business."

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