American Danielle Collins stunned Poland's Iga Swiatek with a commanding 6-4 6-1 victory to reach the Australian Open final on Thursday where she will face local favourite Ash Barty.
Collins, ranked 30 in the world, made a lighting start on Rod Laver Arena and raced into a 4-0 lead.
Seventh seed Swiatek responded to claw back some of the damage but 28-year-old Collins held firm to close out the set.
It was a repeat show in the second set as a dominant Collins again roared into a 4-0 lead.
This time there was no counter-attack by 2020 French Open champion Swiatek as Collins, showing no nerves as her first Grand Slam final loomed, wrapped up victory on her second match point in 78 minutes.
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