Berrick Barnes says Australia are determined to sign off their season with a win over Wales and confirm second place in the world rankings.
The Wallabies are third in the IRB standings and will move above South Africa if they win at the Millennium Stadium on Saturday.
Wales are desperate for a victory that would prevent them from dropping out of the top eight but Barnes says an Australian victory in Cardiff would be just rewards for an injury-ravaged season that began at the same venue.
He said: "It would be huge. We started there and to finish there would probably be a great reward for the hard work that a lot of blokes have put in, especially the coaching staff.
"We've been like a hotel this year, people have been coming to stay left, right and centre and then leaving.
"The coaching staff, they've adjusted and handled it. It has been a credit to them."
Barnes will win his 50th cap on Saturday and hopes to mark it with a victory, but the Waratahs is expecting a tough outing against a Welsh side that have lost six games on the trot.
"They're desperate and we've been desperate a number of times this year and have responded well from it and I definitely know how they'd be feeling," said the 26-year-old.
"This is a game where they can out a line in the sand before the Six Nations. It's a big opportunity for them. So they've got their reasons and we've got ours."
The Wallabies, who beat Wales to third place in the World Cup and then notched up three straight wins over the Welsh on summer tour, got their autumn series off to a disastrous start with a 33-6 defeat by France.
They have since rebounded with victories over England and Italy, and Barnes insists there would have to be a marked improvement on the second period they played against the Italians, when they almost let a 16-point lead slip.
"I don't think we'll be breathing fire and getting too carried away with it all. I think we've got to play smarter than we did last week," he said.
"The first half was one of the best halves of footy we've played but we didn't play well at all in that second half."
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