Defending champions Australia and challengers England made just one change each to their starting lineups on Wednesday when they announced their teams for Saturday's World Cup final.
England recalled Mike Tindall in the centres at the expense of Mike Catt while Australia called up Al Baxter to replace the injured Ben Darwin at tighthead prop.
Utility back Matt Giteau returns to the Wallabies bench after injury.
"We've got a young pack and they've got no fear, they've got nothing to be frightened about," said Wallaby coach Eddie Jones."All they've got to do is go out there and play well and they'll do that, they'll play with a lot of aggression. If we're good enough we'll get on top of them, if we're not good enough we won't.
Catt took over from Tindall for last Sunday's 24-7 semi-final win over France, partly to act as second receiver and ease the pressure on flyhalf Jonny Wilkinson.
With the more physical threat of the Wallabies in mind, coach Clive Woodward has returned to Tindall, a stronger and quicker player than Catt.
"We made the change for the French game but playing Australia it's right to go back to Tindall," said Woodward. "Tindall is a key part of our team and has been for a long time.
"It's horses for courses. I have to select the side I believe is best suited to winning the World Cup final.
Australia arrive in Sydney from their Coffs Harbour training base tomorrow while England have been based at Manly.
AUSTRALIA:M Rogers; W Sailor, S Mortlock, E Flatley, L Tuqiri; S Larkham, G Gregan; B Young, B Cannon, A Baxter, J Harrison, N Sharpe, G Smith, P Waugh, D Lyons. Replacements: J Paul, M Dunning, D Giffin, M Cockbain, C Whitaker, M Giteau, J Roff.
ENGLAND:J Lewsey (Wasps); J Robinson (Sale Sharks), W Greenwood (Harlequins), M Tindall (Bath), B Cohen (Northampton); J Wilkinson (Newcastle), M Dawson (Northampton); T Woodman (Gloucester), S Thompson (Northampton), P Vickery (Gloucester), M Johnson (Leicester, capt), B Kay (Leicester), R Hill (Saracens), N Back (Leicester), L Dallaglio (Wasps). Replacements: D West (Leicester), J Leonard (Harlequins), M Corry (Leicester), L Moody (Leicester), K Bracken (Saracens), M Catt (Bath), I Balshaw (Bath).