Brumbies captain Allan Alaalatoa believes the Brumbies need to turn Saturday’s clash with the Fijian Drua into a physical battle if they wish to be successful.

The Brumbies are coming off a narrow win over the Western Force, with Lachlan Lonergan scoring in the 79th minute to steal victory.

Lonergan has been promoted to the starting side alongside brother Ryan as coach Dan McKellar experiments with his line-up.

This comes after a below-standard performance at set-piece time, with the ACT-based club struggling with their line out on multiple occasions throughout the first half.

After a mistaken-ridden showing, Alaalatoa believes they need to limit the errors against a Drug side which thrives off broken play and loose ball.

"There were a lot of learnings from last week…we made too many mistakes and what we do know is if we do the same thing tomorrow they'll probably capitalise on that,” he told reporters.

"We turned over the ball too many times, that's going to happen but if it does, we need to be better at reacting and moving onto the next job.”

They are refusing to look too far into the expansion side’s opening round performance, dominated by the Waratahs 40-10.

Winger Tom Wright believes the conditions will be ideal for the type of Rugby Fijian Drua coach Mick Byrne wants them to play, making them a dangerous threat across the park.

“I think 2 pm in a hopefully dry and sunny game in Canberra, I think the pictures we get will be a bit different than the Tahs got in terms of skill level," he said.

“A lot of the stuff they like to get off such as their offloads and flair, it’ll come out in that afternoon game.

“It’s probably good news for us. We have a fairly big challenge coming, we’ll probably see the best of the Drua come out in round two.

“They’re a team that’s going to thrive off their energy. From 1-23, they’re just as skilful as each other. In terms of us, when need to try to play to our strengths and take them to set piece, it’s no secret that we’re well equipped in that area but to improve on where we felt we let ourselves down last week, was pretty disappointing.”

"We've watched two games from them, but we saw two different things,” Alaalatoa added.

"They're so good in attack when you give them opportunity. We've got to be very precise with how we give them the ball and make sure our defence is a little bit better."