Australia breezed into the ICC Women's T20 World Cup final with a convincing eight-wicket win over West Indies at The Oval.
West Indies slumped from 47-0 to 83-6 after losing the toss and batting first, with Georgia Wareham (2-17) bowling Hayley Matthews (30) to spark a flurry of wickets and putting Australia firmly on top.
Deandra Dottin - batting down the order after being carried away by team-mates with a "medical issue" moments before the match - fired an unbeaten 26 and put on a late 42-run stand with Jannillea Glasgow (15), lifting West Indies to 125-7 from their 20 overs.
Australia lost Georgia Voll (16) and Phoebe Litchfield (four) inside the powerplay but saw Beth Mooney fire a 29-ball half-century, her 30th in T20Is, to accelerate them towards their victory target.
Mooney finished unbeaten on 61 from 36 balls and Ash Gardner followed 2-13 with the ball by posting 35 not out from 20 deliveries, as the six-time world champions raced to their victory target with seven overs to spare.
Matthews smashed Lucy Hamilton's opening ball to the boundary and added three more inside the opening three overs, although Qiana Joseph struggled to score at the other end as West Indies reached 35-0 at the end of the powerplay.
Joseph was dropped on six when Voll shelled a relatively simple catch in the deep, then smashed Annabel Sutherland over long-on for a maximum in the next over, before Wareham claimed a first-ball wicket when she bowled Matthews around her legs.
Wickets fell regularly as Joseph swept Sophie Molineux straight in the deep to Gardner, who had Stafanie Taylor (0) chip to mid-wicket and Jahzara Claxton (0) pick out Molineux in the covers to leave West Indies 59-4 at the halfway stage.
Molineux had a second when Henry (10) was caught in the deep immediately after a drinks break, with Campbelle (22) picking out Ellyse Perry at mid-off off Wareham to leave them six down, only for Dottin to deliver a late boundary burst after being cleared to feature.
Dottin fired 26 from 16 deliveries and added 34 from the final three overs with Glasgow, who was caught behind from Sutherland's final delivery, giving West Indies a more competitive total to defend than initially feared.
Australia raced to 29-0 when Voll was bowled by Chinelle Henry at the end of the third over, while Matthews trapped Litchfield lbw soon after - following a successful review - to leave Australia on 43-2.
Any hopes of a famous West Indies win were quickly quashed by Mooney, who smashed Claxton for 18 in her first over and continued to impress as Gardner came to the crease when Perry (two) retired hurt.
Gardner hit Afy Fletcher for back-to-back boundaries shortly before Mooney reached her half-century in the 11th over, with Gardner then signing off victory by hitting the winning runs off Aaliyah Alleyne with 42 deliveries to spare.
Victory continues Australia's 100 per cent record in this year's tournament and moves them a step closer to a record-extending seventh Women's T20 World Cup title, with England or South Africa now awaiting in Sunday's final.
Player of the match, Australia's Ash Gardner (2-13 and 35no off 20 balls):
"Really pleasing to get the win. I feel I haven't really had an impact with the ball in the tournament so to save my best until now is pleasing. I have been pretty inconsistent but today it worked. I made sure I was hitting the stumps as much as possible. Getting a couple of scalps is nice.
"With the bat, I feel confidence is a big one and giving myself a chance. I feel when I have thrown my wicket away, I have gone too early and not got myself in, so it was about using the first six balls, hitting the sweep, running hard and then hopefully the boundaries come after that."
West Indies captain Hayley Matthews:
"We did not play to our full potential for the entire tournament. We were not able to execute a full team performance in any game. As a group we can still hold our heads high. We had some bright sparks. We didn't have any standout performances, so everyone had to chip in.
"We probably missed someone having a really big tournament, but we have a lot more people playing roles now. We wanted to get off to a good start today and I probably put myself under a bit of pressure. It was a difficult one to assess - we needed to get the run-rate up but I also needed to stay at the crease."
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The second semi-final sees hosts England face South Africa at The Oval, with coverage live on Thursday from 6pm on Your Site Cricket and Your Site Mix (first ball 6.30pm).
The winners will then face Australia in Sunday's final at Lord's. Coverage starts at 2.30pm on Your Site Cricket and Your Site Mix (first ball 3.30pm). .
