Serena Williams produced a stunning performance to beat second seed Simona Halep and set up an Australian Open semi-final with Naomi Osaka.
The 39-year-old American, bidding for a record-equalling 24th Grand Slam title, won 6-3 6-3 against the Romanian.
“I think this is the best match I played this tournament,” said Williams, who moved well and hit 24 winners.
Earlier on Tuesday, Osaka cruised past Hsieh Su-wei in just 66 minutes to reach the last four.
The Japanese third seed, who won the second of her three Grand Slam titles at Melbourne Park in 2019, beat the Taiwanese 6-2 6-2.
Now Osaka will face Williams – a seven-time champion in Melbourne – on Thursday for a place in Saturday’s final.
It will the first meeting between the pair since their infamous 2018 US Open final.
That saw Osaka win her maiden major title after Williams accused umpire Carlos Ramos of being a “thief” in some of the most dramatic scenes at a Grand Slam final.
Since then the Japanese player has won two more major titles and is unbeaten on the biggest stage since last year’s Australian Open.