Santiago Phelan's outfit have claimed a draw against South Africa and also pushed New Zealand close in their opening campaign.

And that has led to growing expectation they can overcome Australia in at least one of their two games with the Wallabies in the coming weeks.

Rodriguez is buying into the confidence and is adamant that the Pumas are only a couple of years away from shocking the southern trio.

"I think realistically speaking this year, they could finish third but next year they will have this experience and I think they will really give it a good crack," Rodriguez told AAP.

"If we want to be a bit more conservative, then 2014 Argentina will win it. But I think they will be ready next year for everything.

"Put it this way, I wouldn't put my money or my house on the Wallabies as they've been quite inconsistent," said Rodriguez, who bases himself in Australia.

"Their form in the last two years, they haven't played three or four games at hard level. They play one and then drop off a bit I would say (Argentina) could leave here with a few points and finishing it off in Rosario is a good possibility."