Aryna Sabalenka looks much, much happier than half an hour or so ago, but she is still experiencing plenty of frustrating moments out on Rod Laver Arena.

A series of unforced errors gift Madison Keys a straightforward hold, and now it's over to the top seed to try and send this to a decider.

Jonathan Jurejko
BBC Sport in Melbourne

You wondered how Madison Keys was going to keep up her level.

There has been a bit less precision on her first serve in this second set and fewer winners flying off her racquet.

Sabalenka has improved but is still far from comfortable. The forehand she dumps long, and the subsequent dramatic racquet drop, indicates her displeasure.

Aryna Sabalenka comes through a third break point to hold as Madison Keys nets a return, just when it looked as though she had found a route back into this set.

Instead, Sabalenka is now poised to take this match into the third set that, really, the crowd desperately want to see.

Annabel Croft
Former British number one on BBC Radio 5 Live and BBC Sounds

Sabalenka has pulled Keys' level down and made her feel a little less comfortable.

She isn't giving her the balls that enable her to set-up and strike the way she was in the first set.

If we compare the Madison Keys that we are seeing now to the one that started the match, she looks a completely different player. She isn't controlling the baseline or thumping winners into the corners or playing with a lot of freedom.

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Aryna Sabalenka is world number one for a reason.

The Belarusian sees off both break points, ticking off the second with an ace.

A wonderful, spinning forehand drop shot barely bounces off the court as she reaches game point, but Keys lets fly with a stunning forehand on the run to deny her.

What a final the Rod Laver Arena are being treated to here.

It's not all sunshine and rainbows for Aryna Sabalenka just yet, however. A really bad miss on the forehand reminds us all that she is still grappling with her own nerves.

It's all the encouragement Madison Keys needs. The American crashes in a backhand for two break points!

Pat Cash
Former Wimbledon champion on BBC Radio 5 Live and BBC Sounds

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That was one heck of a roar!

We are used to Aryna Sabalenka roaring when she hits the ball, but her screech was deafening.

Fair enough after that one though.

This match really feels like it has balanced out now, with Aryna Sabalenka only improving and Madison Keys just coming off the gas slightly after her superb start to this final.

In this moment, the momentum has swung Sabalenka's way.

The world number one makes a forehand winner with the first of two break points and lets out a huge roar as she takes complete control of the second set.

Annabel Croft
Former British number one on BBC Radio 5 Live and BBC Sounds

I just feel like there is a different look about Aryna Sabalenka now.

Her body language and her walk, basically everything about her is giving off more positive energy.

Her tennis might not be where she wants it to be but there is a different look about her. Madison Keys will be aware of that as well.

Aryna Sabalenka recovers to 30-30 and another miss from Madison Keys on a second serve helps the top seed hold with a fourth straight point.

Madison Keys needs to make sure she stays with Aryna Sabalenka now. Given the world number one's performance so far today, Keys knows she can expect her own opportunities as this set progresses.

She might get one straight away. A brilliant backhand fizzes past an advanced Sabalenka for 0-30.

A bit of momentum growing for the world number one now, as Aryna Sablenka keeps up the pressure to force a second and then third break point.

Into the net from Madison Keys!

Sabalenka strikes the first blow in set two.

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Aryna Sabalenka channels her bubbling frustration into a ferocious backhand as she looks to put more pressure on Madison Keys and really begin to test those nerves.

Keys comes up clutch with an ace on a big point for 30-30, and then denies Sabalenka a break point - but the danger hasn't past just yet.

Pat Cash
Former Wimbledon champion on BBC Radio 5 Live and BBC Sounds

That was a huge first hold for Keys. It was so important to stay on top after the first set, but you can feel that it's not as easy and free-flowing as it was in the first set for her.

Sabalenka was in control on a couple of those points but obviously Keys got lucky from a really poor smash from Sabalenka.

Sabalenka didn't grab the opportunity there - and you need to in a final.

Aryna Sabalenka takes a deep breath at the back of the court after missing another forehand. Resetting, she gets across the line to ensure she keeps up with Madison Keys at the start of set two.

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Aryna Sabalenka looks exasperated after missing a forehand to give Madison Keys a head-start on her latest service game. The world number one needs to keep calm here and trust that she will find her game before it is too late.

A shake of the fist from Sabalenka follows a much-needed ace for an easy point to edge ahead at 30-15.

That feels like a significant hold of serve by Madison Keys as she looks to build on her first set display.

Seeing off those two break points will only add to Aryna Sabalenka's frustration here.

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Aryna Sabalenka will also be hoping Madison Keys isn't able to sustain the level she produced in set one.

The American misses to gift Sabalenka another break point, but efficiently dismisses this latest pressure point with an ace.

Annabel Croft
Former British number one on BBC Radio 5 Live and BBC Sounds

It just feels like it is a horror day for Aryna Sabalenka.

She played a much better point just now. It was well constructed, it was one of the few points where you felt like she was starting to get in control of things and then she missed the final finish!

Aryna Sabalenka, you would expect, can only improve on that first set performance. But she's still not quite on it following that break and completely misjudges an overhead.

The world number one brushes that off impressively with back-to-back forehand winners. Break point!