Wallabies lock Dean Mumm had only scored one try in 33 Tests but his second was more than worth the wait.

The 31-year-old, returning to the international arena after a five-year absence, scored a brilliant solo try to crush Argentine hopes before the Australians ran away with a 34-9 victory in Mendoza.

The stirring performance off the bench gave Australian coach Michael Cheika plenty to consider ahead of their Rugby Championship title-deciding clash with the All Blacks in Sydney on August 8.

Cheika was asked post-match about the return of Kane Douglas, whose signing with Queensland from Leinster is expected to be confirmed this week to put him into World Cup consideration.

The coach said he was happy with the way the locks in the squad were performing, with Will Skelton using his giant frame to make plenty of ground against the Pumas.

James Horwill, who excelled in their first match against the Springboks, didn’t even get a run in Argentina.

“It just doesn’t mean he’ll come straight back in,” Cheika said of Douglas.

“What I need to do is to see him training and fit.”

Mumm made the key play in the 60th minute when he brushed past four defenders after finding space on the wing.

He said he couldn’t have asked for a better return to the Australian fold.

“To be honest, I’ve been out of the Test arena for a couple of years so I was stoked to touch the ball in a Test match, let alone get a try or a carry,” he said.

“I only had one Test try previously and it was about two metres out, so this was an improvement.”

He hoped the performance meant he could push for a berth in the winner-takes-all Sydney match.

“We’re all pretty excited and pretty hungry,” Mumm said.

“It’s a very competitive environment at the moment and hopefully they do have tough decisions to make.”

Mumm obviously missed last year’s disappointment at the same ground, when the Australians blew at 14-0 to lose to the Pumas for the first time since 1997.

With coach Ewen McKenzie departing soon after, it was a new low for the Wallabies.

Mumm, who returned from English rugby to NSW late in the Super season, said his teammates had put it behind them with the win.

“Speaking to a lot of the boys about what happened here last year, it’s a nice turnaround,” he said.