Ash Barty win the Australian Open final 6-3, 7-6 (2) over Danielle Collins, ending a 44-year drought for Australian women at their home Grand Slam tournament.
The 35-year-old Spaniard advanced to the Australian Open final for a sixth time with a 6-3, 6-2, 3-6, 6-3 win over seventh-seeded Matteo Berrettini.
Barty, the first Australian woman into the final of her home Grand Slam since 1980, is looking to add to her 2019 French Open and 2021 Wimbledon titles.
Unseeded American Amanda Anisimova saved two match points to stun the former world number one 4-6, 6-3, 7-6 (10/5) in third round match.
Britain's Andy Murray, ranked 113 and playing as a tournament wild card, didn't stick around afterwards and walked quickly from the court, showing great disappointment at his lost opportunity.
Osaka, winner of the 2019 and 2021 Australian Opens, has vowed to have more fun on court this year, following a difficult last year in which she said she had suffered from depression.
With the men's world number one Novak Djokovic flying home after being denied entry to defend his title, the tournament remains wide open with Rafael Nadal, Alexander Zverev, Daniil Medvedev and Stefanos Tsitsipas all in contention.
Serbian President Aleksandar Vucic has said authorities in Australia "humiliated themselves" and Prime Minister Ana Brnabic called the decision to deport tennis player Novak Djokovic "scandalous."
The hearing will decide whether the Australian Open's top seed and defending champion can retain his title and become the first male player in history to win 21 Grand Slams.
The tennis star has been placed under guard ahead of a federal court hearing regarding his possible deportation.
The tennis star's visa was cancelled over community health risk concerns, with the tournament set to begin on Monday.
World number four's criticism comes as Novak Djokovic was included in the Australian Open official draw, although it is still uncertain whether the Aussie government will cancel Djokovic's visa for a second time over breaking Covid protocols.
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