Osaka's struggling to find her first serve, but she gets in front as Kvitova whacks her return long.

Shot! A spinning backhand winner from Osaka, beating Kvitova, and Osaka comes through once again.

Kvitova has a chance on the Osaka second serve, but she can't take it!

A loopy sort of backhand from the Czech takes us to deuce.

Kvitova is stretched in a rally behind the Osaka second serve, and she's off-balance as she flaps a forehand into the net.

30-40.

That's a great shot from Osaka, sending her return deep, and Kvitova errs on the backhand.

15-40.

Image source, Getty Images

An irked tilt of the head from Naomi Osaka as she double faults for 0-30.

Now then. Kvitova's cross-court backhand puts her in front in a rally and, with a long Osaka defensive push, Kvitova has three break points.

Kim Clijsters
Four-time Grand Slam champion on BBC Radio 5 live sports extra

It's a 50-50 match and so far it's been very even. Both players are playing great tennis.

Brenda Parry: This final has got all the ingredients for a cracking match and both are deserving winners IMO!

Kvitova unfurls a drop shot to wrong-foot Osaka, and she gets in front as her opponent nets.

Out wide goes the Kvitova serve. Osaka reads it, but she can't control her return!

Kvitova holds.

Image source, PA

That's the first "pojd" of the match!

Kvitova goes for a serve out wide, a sprawling Osaka returns, and Kvitova passes her for deuce.

Kvitova goes for a one-two punch, serving out wide then aiming a forehand down the line, but she misses by a mile for 15-15.

Osaka's return of serve takes a wobble off the net but Kvitova does well to get forward and flick over a response, and a surprised Osaka nets.

Terrific striking from Osaka, forcing Kvitova to move and stretch, and she brings up break point with a wayward Kvitova backhand...

Kim Clijsters
Four-time Grand Slam champion on BBC Radio 5 live sports extra

Osaka keeps playing high-risk tennis even when they are up against break point. It's impressive.

Osaka finds her first serve, and Kvitova's backhand is out.

Advantage, Osaka - and she holds as Kvitova sends a forehand over the baseline.

That's a good hold for Osaka, standing firm to the Kvitova backhand.

Clever from Osaka, serving to Kvitova's forehand, and she gets the advantage as the Czech nets.

Whoops. Osaka approaches the net but she doesn't time it and, with a swing of the racquet, Kvitova passes her for deuce.

Kvitova's got Osaka stretched on the right side, but she nets her backhand as she aims cross-court.

40-40.

Image source, Reuters

Hello!

Kvitova latches on to an Osaka second serve, sending another backhand winner firing back for another break point.

A mini-rally, and it's Kvitova who blinks first!

Deuce.

Good defence from Kvitova, and she gets the first point on the Osaka serve as the Japanese flashes a backhand low into the net.

Osaka cracks down a 119mph ace for 15-30 and there's a soft cry of "come on" as Kvitova sends a return of serve long.

Shot! What a return of serve that is from Kvitova, a backhand going cross-court, and she's got herself a break point.

The first real rally of the match and it goes Osaka's way as she darts forward and whacks a Kvitova block down the line.

Osaka is stepping in to face Kvitova's second serve but the Czech goes down the T, and Osaka's response is long.

Down swings an ace and then a serve out wide tidies up the game for Kvitova.

Dan Monk: This promises to be an epic match. My head says Osaka, my heart says Kvitova.

Tim Symes: Come on Petra, I mean Naomi. Osaka needs to celebrate a win, but Kvitova a win means recovery complete (ish) There's no way I want either to lose.

Image source, EPA

Anything Kvitova can do, Osaka can do too.

Stonking serving from Osaka, finding a huge ace to wrap up a hold to love. Lovely stuff.