Australia say they expect a really tough contest when they face the British and Irish Lions in the decisive third test at Sydney's Olympic Stadium on Saturday (July 6).

Little has separated the sides in two intense and dramatic matches, the Lions winning by two points in the opener in Brisbane and the Wallabies by a single point in the second in Melbourne last week.

The Wallabies scored two tries in the first test defeat through winger Israel Folau and the only try in their victory in the second match in Melbourne but scrumhalf Will Genia says they have to get up to speed quickly.

"We have to make sure that we start well, you know. I think we have been chasing the game a little bit too much in the last two tests and playing, just playing off the back foot. So if we can start well and give ourselves a good opportunity to get into the game, yeah we definitely back ourselves to play some good rugby and really have a go you know. Play some good running rugby," Genia told reporters in Sydney on Friday (July 5).

Lions coach Warren Gatland has added fit-again prop Alex Corbisiero, a bigger hooker in Richard Hibbard, as well as the hulking number eight Toby Faletau and flanker Sean O'Brien in the back row for the decider.

Lions have new captain Alun Wyn Jones, as regular skipper Sam Warburton is injured and possible replacement Brian O'Driscoll was dropped from the squad. Wallabies have their captain James Horwill restored after he was cleared of stamping earlier in the week.

Presented by Adam Justice