Australian captain Michael Clarke is out of the one-day international series decider against Sri Lanka at Bellerive.
Clarke has failed to recover from an ankle injury he suffered at training on Tuesday and his place in the side has been taken by spinning allrounder Glenn Maxwell.
Tasmania skipper George Bailey will deputise as captain.
Sri Lankan captain Mahela Jayawardene won the toss and sent Australia in.
Maxwell will bat at No 6 with keeper Matt Wade moving up the order top open with Dave Warner.
Bailey will skipper Australia for the first time on his home ground.
Ben Cutting is Australia's 12th man while Upul Tharanga will carry the drinks for Sri Lanka.
The visitors lead the five game series 2-1 after game four in Sydney was washed out on Sunday.
Clarke told the Nine Network x-rays had cleared him of a fracture but he may need an MRI scan.
Australia's next ODI is against West Indies on February 1.
Australia: David Warner, Matthew Wade, Phillip Hughes, George Bailey (capt), David Hussey, Glenn Maxwell, Moises Henriques, Mitchell Johnson, Mitchell Starc, Clint McKay, Xavier Doherty, Ben Cutting (12th man).
Sri Lanka: Mahela Jayawardene (capt), Tillakaratne Dilshan, Lahiru Thirimanne, Dinesh Chandimal, Angelo Mathews, Kushal Perera, Jeevan Mendis, Thisara Perera, Nuwan Kulasekara, Rangana Herath, Lasith Malinga, Upul Tharanga (12th man).
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