Ashleigh Barty will bid to become the first home female singles semi-finalist at the Australian Open for 35 years when she takes on Petra Kvitova in the last eight.
Barty hopes to make up for an "agonising" defeat by Kvitova in the final of the Sydney International.
The 15th seed knocked out Russian Maria Sharapova in the fourth round.
"It is exciting that I have another chance at Petra straightaway," said Barty.
Czech eighth seed Kvitova edged a close final in Sydney earlier this month and Barty is relishing the chance of revenge.