Alun-Wyn Jones expects to encounter a 'wounded animal' when Wales tackle Australia at the Millennium Stadium tomorrow.
While Wales look to end their autumn Test series with a third successive win, Australia are facing a salvage job.
Having set their sights on a successful Grand Slam mission by defeating England, Ireland, Scotland and Wales, the Wallabies could head home reflecting on a meagre 25% success rate.
Their 18-9 victory at Twickenham seems an age ago, and they have arrived in Cardiff following a 9-8 loss to Scotland, Australia's first in that fixture since 1982.
But Wales lock Jones is braced for a fearsome challenge in all departments.
'They will most definitely be like a wounded animal,' he said. 'It will be a completely different ask for us, especially given the way Australia are playing in the back-line, the way they are constructing their moves and playing rugby.
'They are another major southern hemisphere side, but they will pose a completely different challenge.
'We will see if we can maintain the momentum we have picked up after beating Samoa and Argentina, and this will be the telling of how far we have come from last year's autumn series.'
