South African coach Harry Viljoen has declared the Springboks ready to do the double over Australia in their return Tri-Nations clash at Subiaco Oval in Perth.

"I have always said Australia are a good side, but there is no reason why we cannot beat them," Viljoen said as his squad prepared for Saturday night's match.

The Australians are still smarting after being beaten 20-15 at the end of July at Loftus Versfeld in Pretoria, but will face South Africa with greater confidence this time around after emerging with their first ever Carisbrook victory, 23-15, against New Zealand in Dunedin Saturday.

"Australia showed a lot of composure, especially after New Zealand came out in the first few minutes (when giant Jonah Lomu went over for a try)," Viljoen said.

"It's not any team that can go on to win after a start like that.

"Obviously, they will be working hard to get their momentum going for the match against us.

"They will probably have dry conditions, home ground advantage and a New Zealand referee (Steve Walsh) -- and maybe they will have a different attitude."

Viljoen said Australia had great experience because they had been together for four or five years and were a cohesive unit.

"As a unit they are certainly awesome, but I repeat that there is no reason why we cannot get up there."

South African skipper Bobby Skinstad said that now his team had proved they could beat Australia, all the players had been trying to sharpen their game.

"It is a matter of focus on individual's games. The guys are all trying to sharpen up so they are a more polished and efficient cog in an engine that works together," he said.

"The focus comes from the players. For example, the second rowers look at every single Australian line-up option, so that when they come across it on the field there is nothing new to them and there are no surprises.

"The outside backs are looking at the movement they use and could use on the park."

Skinstad said the team was benefiting from Viljoen's policy of letting players come up with their own ideas on ways they thought they could secure an edge over the opposition.

"This is brilliant, because it generates a lot of enthusiasm around each guy and his role in the team," he said.

Skinstad also contributed to the debate over New Zealand captain Anton Oliver's decision to pass up a relatively easy penalty attempt with 90 seconds remaining in Saturday's Dunedin game.

A successful kick at goal would have given the All Blacks a bonus point to take them level on points with Australia in the competition standings.

"It's fantastic to have a go for the line, but if the referee says it's just about time up, I don't think it is conceding defeat in any way. I think you are looking towards a greater end and that is securing a position in the Tri-Nations."

Wallaby coach Eddie Jones said he expected continued improvement on set pieces.

"We just did our basics really poorly in the first game and we've been working really hard in that area," he said.

"Against New Zealand we improved in certain aspects but we've got a lot of hard work ahead of us this week."

The injury cloud over bustling centre Daniel Herbert has evaporated leaving every player from Saturday's historic victory available for selection.