Naomi Osaka 7-6 (7-2) 5-7 6-4 Petra Kvitova
Kvitova saves three championship points to force third set
Osaka becomes world number one after winning back-to-back Grand Slam titles
*Kvitova 6-7 (2-7) 7-5 1-1 Osaka
A great pick-up on the baseline from Kvitova keeps her in a rally, and she strikes with a cross-court swipe to out-muscle Osaka.
Kvitova's forehand still isn't working properly, as she whips one into the net for 15-30, but a shank from Osaka and a huge Kvitova serve gets her in front.
Now then. Kvitova nets a backhand. Deuce.
Jonathan Jurejko
BBC Sport at Melbourne Park
Well... No-one inside Laver saw that coming.
Kvitova rattled off 12 points on the bounce to lead for the first time in the match.
Osaka has lost her head in the past 25 minutes - can she regroup?
*Kvitova 6-7 (2-7) 7-5 1-1 Osaka
Kim Clijsters
Four-time Grand Slam champion on BBC Radio 5 live sports extra
The situation is different [than in the US Open final] because Osaka has the pressure of being the slight favourite a little bit now. To be that close to winning and then not is very tough for any player...
*Kvitova 6-7 (2-7) 7-5 1-1 Osaka
That's a shot and a half from Osaka, crouching down low and sending a backhand cross-court for 15-15.
Kvitova misses successive forehands to put Osaka within distance of a hold - and a furious swipe into the corner of the court secures it!
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Alex Haworth: Can't see Osaka winning this now. Complete collapse.
Craig Evry: Kvitova has real fight.
Image source, Getty ImagesKvitova 6-7 (2-7) 7-5 1-0 Osaka*
A rocket of a forehand from Naomi Osaka drifts just, tantalisingly, over the tramlines.
Wallop. Petra Kvitova slams her way to a love hold. Five games in a row for Kvitova.
*Kvitova 6-7 (2-7) 7-5 0-0 Osaka
The first point goes Petra Kvitova's way, as Naomi Osaka nets a forehand.
Kvitova 6-7 (2-7) 7-5 Osaka
Kim Clijsters
Four-time Grand Slam champion on BBC Radio 5 live sports extra
I wonder how much Osaka can keep the memory of having those three match points out of her head...
*Kvitova 6-7 (2-7) 7-5 Osaka
Well, they don't call her P3tra for nothing.
Astonishing from Kvitova to hang in there. This has been such a good match.
Petra Kvitova will serve first.
Kvitova 6-7 (2-7) 7-5 Osaka
Gigi Salmon
Radio 5 live sports extra tennis commentator at Melbourne Park
Osaka puts her towel over her head and has left the Rod Laver Arena...
Kvitova 6-7 (2-7) 7-5 Osaka
David Law
BBC Radio 5 live sports extra tennis commentator at Melbourne Park
It's seriously stressful out here for those who are Naomi Osaka fans. They are shrieking when she loses a point. Suddenly, this is not a foregone conclusion she is going to win this match despite those championship points.
Kvitova 6-7 (2-7) 7-5 Osaka
Naomi Osaka double faults!
We're going three!
WHAT IS HAPPENING?
Image source, Getty Images
Image source, ReutersKvitova 6-7 (2-7) 6-5 Osaka*
Cross-court goes Osaka with the forehand, and she misses!
Three set points to Kvitova.
Kvitova 6-7 (2-7) 6-5 Osaka*
That's unlucky for Osaka, a net cord taking what looked to be a sure winner over the tramlines.
And again! Osaka screams in frustration. It's a game of fine margins.
0-30.
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Joel Newnham: Don't think I've heard Kvitova shriek like this before.
Image source, PAKvitova 6-7 (2-7) 6-5 Osaka*
Gigi Salmon
Radio 5 live sports extra tennis commentator at Melbourne Park
Kvitova - from being championship points down - has turned things around!
Kvitova 6-7 (2-7) 6-5 Osaka*
And again, Osaka nets a return of serve!
Osaka, having served for the match, will now serve to stay in the set.
*Kvitova 6-7 (2-7) 5-5 Osaka
Big first serve out wide from Kvitova, and Osaka nets.
Advantage, Kvitova...
*Kvitova 6-7 (2-7) 5-5 Osaka
And Kvitova shimmies forward and hits a short ball into the corner!
Deuce!
*Kvitova 6-7 (2-7) 5-5 Osaka
Shot!
Osaka puts all her anger into a spinning backhand strike and a stretched Kvitova nets.
Break point to Osaka.