Defending champ Azarenka through to semis after overcoming tricky Kuznetsova
with a wonderfully creative display – mixing clever angles with raw power.
But it was not enough to derail Azarenka who, having edged the first set, ran through the second to register her 12th successive win in Melbourne, 7-5, 6-1.
The defence continues: Victoria Azarenka celebrates her win over Svetlana Kuznetsova
'She played really well throughout the whole match,' said Azarenka. “I know what kind of tennis she is capable of and in the beginning it took a little bit of adjustment because she has a very different game.
'I am glad I could produce my best tennis when it was needed.'
Azarenka needs to retain the title on Saturday night to stand any hope of keeping her number one ranking and it looked as though that position was under severe threat in the early stages as Kuznetsova came out firing, displaying the kind of tennis which saw her win the 2004 US Open and 2009 French Open crowns.
Tough test: Azarenka faced a challenge in the first set
At full stretch: Svetlana Kuznetsova struggled to match her first set performance in the second
This was no typical crash, bang, wallop encounter, with Kuznetsova particularly inventive.
Deft with the drop shot and imaginative from mid-court, she tried to move Azarenka off the baseline from where she can do the most damage with her brutal groundstrokes.
And for a while it worked. The Russian broke for 3-1 and after holding, an upset seemed on the cards.
But Azarenka roared back, playing some smart tennis of her own.
Famous fan: LMFAO musician Redfoo supports Azarenka
Eye on the ball: Azarenka serves to Kuznetsova
She broke back for 3-4 and then ramped up her performance level even further at 5-5, with a big forehand on break point edging her ahead for the first time in the match.
She served it out and then maintained the momentum by breaking in the opening game of the second.
Kuznetsova hit back immediately but she could not win another game as the top seed advanced to a last-four clash with either Serena Williams or Sloane Stephens.
All over: Azarenka and Kuznetsova shake hands after their match