Mo'unga expecting a challenge from Wallabies rookie Lolesio

All Blacks playmaker Richie Mo'unga believes Wallabies rookie Noah Lolesio wouldn't want it any other way than to be thrown in the cauldron of a Bledisloe Cup Test in Sydney on Saturday.

Aged just 20, Lolesio will make his Test debut at five-eighth in the must-win match following injuries to both James O'Connor and Matt Toomua.

But Mo'unga believes that after steering his Brumbies outfit to the Super Rugby AU title, Lolesio is up for the challenge.

The All Blacks face the Wallabies at 8.45pm Saturday in Sydney.