Bridgetown - Australian captain Steve Smith won the toss and put the West Indies in to bat in the eighth match of the Tri-Nation One-Day International Series at Kensington Oval in Barbados on Tuesday.
Victory for either team will confirm a place in Sunday's final, whatever the result of the last preliminary match on Friday between the West Indies and South Africa.
West Indies have omitted out-of-form fast bowler Jerome Taylor from the squad so pacer Shannon Gabriel makes his ODI debut in a team that will still place great emphasis on the effectiveness of frontline spinners Sunil Narine and Sulieman Benn.
Australia have retained the same eleven from the rain-ruined no-result against South Africa on Sunday and will rely on the fast bowling firepower of Mitchell Starc, Josh Hazlewood and Scott Boland to give them the early advantage in what is a must-win situation in their final preliminary match of the competition.
Jason Holder (captain), Johnson Charles, Andre Fletcher, Darren Bravo, Marlon Samuels, Denesh Ramdin (wicketkeeper), Kieron Pollard, Carlos Brathwaite, Sulieman Benn, Sunil Narine, Shannon Gabriel.
Steve Smith (captain), Aaron Finch, Usman Khawaja, George Bailey, Glenn Maxwell, Mitchell Marsh, Matthew Wade (wicketkeeper), James Faulkner, Mitchell Starc, Scott Boland, Josh Hazlewood.
Umpires: Richard Kettleborough (ENG), Gregory Brathwaite (BAR)
Match Referee: Jeff Crowe (NZL)