Australia will bowl first in the series-deciding third Gillette ODI in Hobart with an unchanged XI.

Both sides announced unchanged teams at the toss - won by Australia skipper Aaron Finch - but there could be a tactical switch in the hosts' batting order.

Finch said hard-hitting Queenslander Chris Lynn could feature at the top of the order.

Lynn bats in the top three in T20 cricket where he is considered one of the most dangerous batters in the world.

Travis Head, who has opened the innings alongside Finch in the first two games in the series, is likely to move down the order.

Australia resisted the urge to play spinning allrounder Ashton Agar, sticking with leg-spinner Adam Zampa.

"Having him (a spinner) in the team just creates that different dynamic in the bowling group," vice captain Josh Hazlewood said yesterday.

"We'll have to have a look at the wicket but I always like the variability of a spinner.

"There's sometimes a little bit in that Hobart wicket in longer-form games but it's usually a pretty good track for limited-overs cricket - probably high scores as per usual."

Australia: Aaron Finch (c), Travis Head, Shaun Marsh, Chris Lynn, Alex Carey (wk), Glenn Maxwell, Marcus Stoinis, Pat Cummins, Mitchell Starc, Adam Zampa, Josh Hazlewood

South Africa: Quinton de Kock (wk), Aiden Markram, Reeza Hendricks, Faf du Plessis (c), Heinrich Klaasen, David Miller, Dwaine Pretorius, Dale Steyn, Kagiso Rabada, Lungi Ngidi, Imran Tahir

Australia v Proteas, Gillette ODI series, November 2018

First ODI: South Africa won by six wickets

Second ODI: Australia won by seven runs

Third ODI: Blundstone Arena, Hobart, November 11

Australia squad: Aaron Finch (c), Josh Hazlewood (vc), Alex Carey (vc), Ashton Agar, Nathan Coulter-Nile, Pat Cummins, Travis Head, Chris Lynn, Shaun Marsh, Glenn Maxwell, D'Arcy Short, Marcus Stoinis, Mitchell Starc, Adam Zampa

South Africa squad: Faf du Plessis (c), Farhaan Behardien, Quinton de Kock, Reeza Hendricks, Imran Tahir, Heinrich Klaasen, Aiden Markram, David Miller, Chris Morris, Lungi Ngidi, Andile Phehlukwayo, Dwaine Pretorius, Kagiso Rabada, Tabraiz Shamsi, Dale Steyn.