Australia lock Kane Douglas told Sports Mole this evening that the Rugby World Cup semi-final against Argentina was the Wallabies' hardest game of the tournament.

Australia's previous two games against Wales and Scotland were closer than the 14-point gap today, but Douglas felt as if Argentina put up the sternest test.

"I think it was our toughest match," said Douglas. "We might have been a bit flat (against Scotland) last week, but everyone was getting around the park and putting themselves about tonight.

"I've got to admit I was pretty tired towards the end after playing the whole 80. I think we did well to keep our foot on the throttle and not let off. They made a few breaks but we scrambled well.

Australia will face Southern Hemisphere rivals New Zealand in Saturday's final at Twickenham. Both sides will make their fourth final appearance, but it will be the first time that the two nations have met at the last hurdle.

"We haven't really been looking at their route to the final," added Douglas. "We're obviously happy to be there.

"We've come through some really tough games, but there's still a lot to work on that we need to get right for next week."

Australia won the last meeting against New Zealand in the Rugby Championship earlier this year, but Douglas does not think that will count for much in six days' time.

"It's going to be a totally different ball game," he said. "It's the World Cup final and obviously all the boys are going to be up for it more than ever before."

Douglas, who is playing in his first World Cup, has played in all five of Australia's matches at the tournament.