Lealiifano is ready to prove himself in Melbourne

The 25-year-old Brumbies centre will also assume the kicking duties after the errant boots of James O'Connor and Kurtley Beale cost the Wallabies what may have been a relatively comfortable victory in Brisbane last weekend.

Lealiifano said of that game, when he was stretchered off in a neck brace following a clash with Jonathan Davies: "I had a few minor headaches, but all the protocols and the tests that you go through during the week with the doctor I passed quite well and I was quite happy with.

"No serious side effects. I probably thought I would be a bit groggy after having a nap on (Brisbane's) Suncorp Stadium, but I pulled up pretty well.

"We'll roll out the team on Saturday and have the same kind of nerves and hopefully have more than 30 seconds."

"I remember most things, the hardest thing was the doctor asking me if I remember the Tahs (Waratahs) and Lions score from two weeks before and I have a struggle remembering that now.

"They quickly ruled me out for going back on. I am feeling disappointed that I couldn't contribute to the side but they did very well under the circumstances.

"I remember coming back out and watching the boys play and just soaking up the atmosphere again ... I'm sure everyone is still excited again.

"Hopefully we can keep players out on the field for long enough to execute our game plan and contribute. We've looked at (the Lions defence) and it is difficult but I think we can try to get the ball to Izzy (first Test two-try hero Israel Folau) as much as we can."