Australia coach Robbie Deans fears the impact a revitalised Jonny Wilkinson will have at Twickenham on Saturday.
A fully-fit Wilkinson has been in excellent form since his summer move to French club Toulon and England are set to benefit during their autumn series.
The 30-year-old will be restored at fly-half for his first Test appearance since March 2008 and Deans is aware of the influence he will have on Martin Johnson's side.
"I think probably the most critical element since the summer has been the introduction of Jonny because that has brought a lot more certainty around the English," Deans said.
"I don't imagine he'll he have changed much as a player. We believe England will be more dangerous with Jonny there. He'll bring a lot of shape to their game.
"His influence on his peers will be valuable in terms of the confidence he'll bring to them.
"We expect to meet England at their best and know that Jonny will contribute to that."
Deans refutes suggestions Australia are happy to sacrifice results during their Grand Slam tour of Britain and Ireland in favour of building a squad for the 2011 World Cup.
A vulnerable Wallabies side have lost six of their last seven matches and finished bottom of this year's Tri-Nations for the first time since 2005.
"The reality is you can only cater for the future by what you do now, and you can only cater for now by focusing on it," said Deans.
"The suggestion is that we've left a lot of blokes behind when they could be here.
"The reality is Al Baxter is the only player who is fit who we've left behind. We don't think in terms of bottom lines.
"We want to win on Saturday. We are not thinking of anything beyond the weekend.
"We've haven't left anyone behind with the idea of using them in the future."