Will Genia

Confident ... Argentina have been given a confidence boost by Will Genia's injury. Photo: Reuters

Argentina feel their chances of a historic Rugby Championship triumph have been ''massively'' boosted by the Wallabies' latest captain's curse injury.

The Pumas have no doubt skipper and halfback Will Genia's season-ending knee injury leaves Australia vulnerable in Saturday night's clash at Skilled Park on the Gold Coast.

Argentina have surprised with their competitiveness in their first three matches in the expanded tournament and are desperate for a first scalp.

While they have drawn with South Africa and rattled the All Blacks for an hour in a 21-5 loss in Wellington, the Wallabies have struggled to go close to their best and were far from convincing 26-19 winners over the Springboks on Saturday in Perth where Genia was hurt.

Back-up halfback Nick Phipps is sure to be targeted with pressure from the Pumas, who had no doubt how much the Wallabies would miss Genia.

''Massively. I think he's been a talisman for them,'' said veteran Pumas prop Marcos Ayerza. ''He's a very important player for them.''

Phipps said he felt pressure but was excited, despite having fewer than 100 minutes of Test experience across four caps. ''There's a hole to fill and hopefully I'll be able to do that.''

AAP