Israel Folau says he is not worried by the prospect of the full weight of the British and Irish Lions' back line hurtling towards him in his Test debut on Saturday night.

The rugby league convert, who scored 37 tries in 38 games from the wing for the Broncos during his two seasons with the Brisbane NRL club, was named on the wing for the Wallabies' first Test against the Lions, despite playing all but one of his Super Rugby games for the Waratahs at full-back.

Lions coach Warren Gatland picked up on the switch immediately on Thursday, flagging an attacking onslaught from his back line at Suncorp Stadium.

''Folau hasn't played a lot on the wing, he's obviously incredibly talented but he's been playing a lot at full-back,'' Gatland said. ''We know what a quality player he is, what an outstanding athlete, but probably the hardest position on the field to defend is almost the winger, so there'll be no doubt he'll receive some sort of attention and we'll see how strong he is at that.''

Folau said he was relaxed about playing on the right flank after training there for the past two weeks. ''I've had plenty of time to train myself playing [there] and I feel very comfortable when I've had opportunities to play there so far,'' he said. ''It doesn't worry me.''

Despite losing storming midfielder Jamie Roberts, the Lions are backing George North, their 1.92-metre, 105-kilogram winger, to test out the Wallabies defence in combination with inside centre Jonathan Davies and winger Alex Cuthbert.

Their work against the Waratahs in Sydney a week ago heralded the threat the Lions back line pose when the platform is laid up front.

Gatland said the match-up of North with Folau alone would make the match ''worth the fare'', while Folau said he was not blind to the challenge confronting him. ''[North] is a quality player and I've had to do my homework over the last couple of weeks,'' Folau said.

''It's going to be a tough challenge for me but I've just got to get stuck in and do my best and try to limit his opportunities.''

Folau's prowess under the high ball is sure to come under scrutiny, especially when the Lions boast the boot of Leigh Halfpenny, their Welsh full-back.

But the visitors have done their own homework, preparing for the likely cross-field kick attempt that worked well for Folau at the Waratahs this season.

''We've been working on a lot of high-ball stuff, being good in the air, being dominant in the air and being as effective as we can,'' North said.

Wallabies coach Robbie Deans, who chose to give three players their Test debuts this weekend, backed his wildcard to the hilt.

''It's not really a debut - he's played international sport before,'' Deans said. ''One of the advantages Israel has is the Lions haven't faced him previously. They will want to limit [his influence] because he's a bloke that makes things happen.''

Gatland was forced through injury to choose a more subtle combination in his back line, naming veteran Ireland centre Brian O'Driscoll in partnership with Davies and Jonathan Sexton at five-eighth opposite Wallabies playmaker James O'Connor.

Lions: Leigh Halfpenny, Alex Cuthbert, Brian O'Driscoll, Jonathan Davies, George North, Jonathan Sexton, Mike Phillips, Jamie Heaslip, Sam Warburton (c), Tom Croft, Paul O'Connell, Alun Wyn Jones, Adam Jones, Tom Youngs, Alex Corbisiero. Reserves: Richard Hibbard, Mako Vunipola, Dan Cole, Geoff Parling, Dan Lydiate, Ben Youngs, Owen Farrell, Sean Maitland.