Coolness under pressure is a Wallaby trademark and the Australian team believe it will be a key ingredient in the Tri-Nations series decider against South Africa on Saturday.

The Australian camp is bracing for an opening onslaught from the revitalised Springboks in Durban after witnessing the power and passion in their 46-40 win over the All Blacks last Saturday.

Wallaby winger Joe Roff expects to face much the same on Saturday but said the Australian team prided itself on being able to handle any challenge.

"We know we have to be on our mettle because the first 20 minutes of each half is a real sorting-out period when they're going to be really passionate and the crowd is going to be right behind them," Roff said.

"We'd like to think our composure is one of our strengths and you have to remember the South Africans don't have a mortgage on passion. We'll be trying to show them that."