Under-pressure Australia are expecting a physically committed United States team to come at them with everything they have got in Friday's Pool C World Cup match.

The Wallabies suffered a shock 15-6 defeat to Ireland last weekend and have left themselves in the position of having to win their two final pool matches, against the US and then Russia, to guarantee a berth in the quarterfinals.

"It's not pretty viewing and not the most enjoyable part of the job for the players or coaches to review those performances, but you get a lot out of it and that's important," assistant coach David Nucifora said of the post-match analysis following the Ireland game.

"It's quite straightforward really. It was there for everyone to see, what happened. So we know where we've got to get better."

Australia must now do what no team has done before and come back from a pool game loss to lift their third Webb Ellis Cup.

"You definitely have to move forward, get on and get ready to play this next game," former Wallaby hooker Nucifora said.

"That's the best thing with rugby, every six or seven days you get a chance to rectify things, so that's what they're looking forward to doing this Friday night here," he added.

Nucifora allayed fears that the Australian scrum, much maligned in recent seasons and also under the cosh in the Ireland defeat, was to blame for that loss.

"Our scrum's gone well this year," he maintained. "We put the All Blacks and Springboks under a lot of pressure and dominated them in recent matches so it's not an issue for us."

However, he added: "The Irish scrummed well the other night, we scrummed inconsistently and what we have to fix is our consistency and our application to that."

Nucifora said he expected a highly committed US team to take to the field, the Americans having battled well in an opening 22-10 loss to the Irish before out-muscling Russia 13-6 for only their third ever World Cup win.

"Commitment. I thing they've shown that already. Physical commitment - they'll throw everything into us, into this match. They've done that in their first two games and you wouldn't expect anything less. It's going to be a tough match," he said.

Nucifora also played down potential differences in northern and southern hemisphere teams as the reason behind the defeat to the Irish.

"There's no surprises for any of us," he said, citing the November tours to Europe that Australia undertake, along with New Zealand and South Africa.

"We were outplayed on the night and we've got to move on from that. The guys are just chomping at the bit to get back out there and get back on track."

Nucifora also reported a clean bill of health for the squad except wing Digby Ioane, who has a broken thumb, and possibly openside flank David Pocock, sorely missed in the Ireland game.

"At this point we expect everyone bar Digby available for selection on Friday," he said.

"Obviously there's David Pocock, we'll see how he improves in the next day or two. At this point we're hopeful but if there's any doubt, we won't risk any of our players, making something that's relatively minor into something major."

Pocock, he said, had shown a "massive improvement" since the Ireland game day.

Ioane said his cast would come off "sometime this week".

"Fingers crossed, hopefully I'll make it for the quarters if we get there," he said. "After last week's game it's going to be hard this weekend (v USA)."

AFP