“What we have is genuine competition for places. That’s been great. We also have Noah [Lolesio] in the background – he’s been learning and growing and that’s good for the group.
“We’re not trying to think too far ahead. I have no doubt that players like Quade and James, they have plenty more footy in them.”
The genuine competition will continue on the spring tour.
Rennie confirmed Cooper, Samu Kerevi and Sean McMahon will all join the squad that travels to Japan before facing Scotland, England and Wales.
While Rennie now knows what Cooper and Kerevi bring to his side, McMahon remains an unknown quantity.
He will play his first Test since 2017 against the Pumas on Saturday, via the bench.
“What we know is that he’s very physical. He’s not the biggest loose forward going around, but he plays big. We want to see that,” Rennie said.
“He’s a machine, in regards to work ethic, and we want to see that. If he can give us physicality and work rate – he’s been around a long time, he’s got a good understanding of his role and he wants to just get out there and enjoy it.
“I think the best part of the game, for him, is having a physical imprint on the game. Expect to see that.”
The Wallabies are seeking four consecutive wins for the first time since the 2017 spring tour when they face the Pumas at Cbus Super Stadium.
“There is certainly belief within the group,” Rennie said.
“We have a good understanding of our game and the effort required to implement that game.
“We’re just working hard. All the things we’ve been doing for the last 18 months. Trying to develop our skill set, trying to develop our game awareness.
“We’re certainly a very fit side now. And we’ve got genuine competition for places. I think that’s helping.
“Guys understand they need to be at their best. Otherwise, they could lose their spot to someone else. I think that’s been really important.
“We have belief in each other, but respect is earned daily. We have to front again on the weekend, otherwise everything we did on the weekend is undone.”
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