The British and Irish Lions must be ruthless in the second Test against Australia to secure a series victory, says assistant coach Rob Howley.
Victory in Melbourne would secure the Lions' first series success since the 1997 triumph in South Africa.
And Howley insists the players know what is required to beat the Wallabies.
"The side that has been selected has Test match animals that have made decisions in games - they understand what is required," he said.
Australia are far from beaten and fought back from losing the first Test the last time the Lions toured Down Under in 2001 for their first-ever series victory.
But head coach Warren Gatland is not resting on his laurels and has made five changes from the 23-21 victory in Brisbane for Saturday's game, which kicks off at 11:05 BST.
Wing Tommy Bowe has made a remarkable recovery from breaking his hand at the start of the tour to take over from Alex Cuthbert.
Ben Youngs replaces Mike Phillips at scrum-half while flanker Dan Lydiate replaces Tom Croft, who drops to the bench.
Lock Geoff Parling and prop Mako Vunipola step in for the injured Paul O'Connell and Alex Corbisiero.
Around 30,000 Lions fans are expected at the 54,000-capacity Etihad Stadium and captain Sam Warburton has said he cannot wait for the occasion.
"Normally, you are pretty nervous in the week going into a big game for your club or country, but the feeling ahead of this one is complete excitement, knowing what you could achieve," he said.
Captain James Horwill starts for Australia despite facing an International Rugby Board appeal against a decision which cleared him of stamping or trampling.
He was cleared at a disciplinary hearing after he was cited after his boot came into contact with the head of Lions lock Alun Wyn Jones.
Australia have kept James O'Connor at fly-half despite struggling in the first Test.
Kurtley Beale, who missed a last-minute penalty that would have given the Wallabies victory, starts at full-back in place of the injured Berrick Barnes.
Australia: Kurtley Beale (Melbourne Rebels); Israel Folau (NSW), Adam Ashley-Cooper (NSW), Christian Leali'ifano (ACT Brumbies), Joe Tomane (Brumbies); James O'Connor (Melbourne Rebels), Will Genia (Reds); Benn Robinson (NSW), Stephen Moore (ACT), Ben Alexander (ACT), James Horwill (Reds - capt), Kane Douglas (NSW), Ben Mowen (ACT), Michael Hooper (NSW), Wycliff Palu (NSW).
Replacements: Saia Fainga'a (Reds), James Slipper (Reds), Sekope Kepu (NSW), Rob Simmons (Reds), Liam Gill (Reds) Nick Phipps (Rebels), Rob Horne (NSW), Jesse Mogg (Brumbies).
Lions: Leigh Halfpenny, Tommy Bowe, Brian O'Driscoll, Jonathan Davies, George North, Jonathan Sexton, Ben Youngs; Mako Vunipola, Tom Youngs, Adam Jones, Alun Wyn Jones, Geoff Parling, Dan Lydiate, Sam Warburton (c), Jamie Heaslip.
Replacements: Richard Hibbard, Ryan Grant, Dan Cole, Tom Croft, Sean O'Brien, Conor Murray, Owen Farrell, Alex Cuthbert.