'Cheika got my UK number - I never gave it to him, didn't want to'

Tatafu Polota-Nau thought he had escaped the clutches of Michael Cheika.

But the Wallabies coach proved his investigative and negotiating skills were up to scratch, luring the English-based hooker home out of the blue for a potential third World Cup campaign.

"I am quite shocked to be back here," the 89-Test veteran hooker told reporters ahead of a possible return in Saturday's Rugby Championship Teat against Argentina in Brisbane.

"I was in good stead with the (Premiership Rugby club) Leicester preseason and all of a sudden my phone rings," said 33-year-old Polota-Nau.

"Little did I know Michael Cheika got my UK number - I never gave it to him, didn't want to, but somehow he got it.

"He asked if I'd come along and I said 'sure why not, I'll give it one last crack'."

Noted scrummager Polota-Nau admits he wasn't happy with what he thought was his farewell Wallabies form last year and it took some convincing from the coach to drag him back i nto the fold.

Knee surgery in the English off-season behind him, Polota-Nau rates himself a chance to feature at Suncorp Stadium and push younger hooking options like in-form Folau Fainga'a ahead of September's World Cup in Japan.

"It ended with a sour note last season ... I sort of thought it was my last with the Wallabies," he said.

"I didn't have the stamina I used to have, but that's because my preparation wasn't the best.

"It's from my end just to see if I've still got it ... give these guys (younger hookers) a run for their money."

The Wallabies are unbeaten in their last five Tests in Brisbane but have won just two of their last seven Rugby Championship clashes.

Argentina are well-stocked with Jaguares talent that played in the Super Rugby decider and, despite losing their last six Tests, present as a genuine threat after their plucky win on the Gold Coast last year.

- AAP