Nathan Lyon has furthered his ODI ambitions in Guyana, revelling in the role of strike weapon as Australia crushed West Indies by six wickets.
Test offspinner Lyon was named man of the match after the hosts capitulated for just 116 in 32.3 overs on a spin-friendly Georgetown pitch.
West Indies were always going to find it hard defending their lowest ever ODI total at home against Australia.
David Warner finished 55 not out, wrapping up victory in 25.4 overs despite a late collapse of 3-7.
Lyon, who was on a hat-trick after accounting for Marlon Samuels and Kieron Pollard, finished with figures of 3-39.
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Skipper Steve Smith, who won the toss, threw the ball to Lyon after just six overs.
"Smithy and I have spoken a couple of times at a few different net sessions about playing a different role. Potentially with the new ball, potentially at the death," Lyon said after bolstering his bid for a permanent gig in the canary yellow.
"I'm pretty happy with it. The ball is coming out really nicely.
"I've been doing a fair amount of work back home and it's paying off."
West Indies looked a shadow of the side that upset South Africa in the tri-series opener at the same venue.
The hosts were reduced to 5-70 in the 17th over then slipped to 8-91, ruining their hopes of a half-decent total.
Mitchell Starc removed both openers in his return from ankle surgery.
Young legspinner Adam Zampa claimed three wickets to clean up the tail, while Glenn Maxwell dismissed Denesh Ramdin.
"It was 7-58 or something from Australian spinners so that's what excites me," Lyon said.
"It's about time.
"I get along with Zampa and Maxi really well. We work really well together and we seem to bowl really well in tandem.
"We're all really good mates, we all want to see each other do well.
"It was exciting to play the first game with Zamps and hopefully there's a big future for both of us."
West Indies skipper Jason Holder lamented his team's "soft dismissals".
"I don't think they got us with any spectacular balls per se. We just played some horrible shots at crucial stages," Holder said.
It could easily have been even worse for the hosts.
Johnson Charles, who top-scored with 22, was on 10 when Lyon had a confident lbw appeal turned down.
A review would have overturned the verdict but Smith wasted the side's only referral in the opening over.
Australia, who banked a bonus point in their tournament opener, next face the Proteas at 3am AEST on Wednesday.
