Hummm..Williams is not hitting her lines very well in the opening stages.

Another return goes long and Kerber takes a 30-15.

But a beautiful, clean back-hand into the corner snatches a point for the American.

However, Kerber keeps her service game with a strong but steady lob down court. 

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Kerber receives a round of applause from Williams and the rest of the arena after a superb low back-hand return which gives her a 15-30 lead.

And now it's break point to the German! 

A steady rally ensues and as Williams goes for the kill, she hits a forehand return long. 

Kerber breaks. Who predicted that?!

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A nervy first serve from Kerber is long...but she gets the second in and Williams can't return. Phew, a point on the board.

A few were worried about the German's serve but she's prodded an ace down the centre and takes the game. Nice work so far.

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Just the 15 bounces before Williams finally gets the game underway. She wins the point with a lovely volley for 15-0.

Two long shots from Kerber over the baseline, and she's then unable to return from a Williams serve. Williams holds to love.

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The popular "let's go" chanting has started. So I reckon it's about time to get started...

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Leon Smith
Great Britain Davis Cup captain

"Kerber's always been a very good athlete. She's very, very quick, stays low to the ground and has extremely strong legs. She's a classic counter-puncher and her serve is a bit of an issue, but she gets away with it because she's a lefty and it stays low and slides away. I would expect to see Serena crunch the second serve, but also really go after the first serve."

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First round: Misaki Doi (JPN) 6-7 7-6 6-3 (2hr 41m) 

Second round: Alexandra Dulgheru (ROU) 6-2 6-4 (1hr 13m) 

Third round: Madison Brengle (USA) 6-1 6-3 (57m) 

Fourth round: Annika Beck (GER) 6-4 6-0 (1hr 28m) 

Quarter-final: Victoria Azarenka (BLR) 6-3 7-5 (1hr 45m) 

Semi-final: Johanna Konta (GBR) 7-5 6-2 (1hr 22m)

The warm-up has begun. Williams is in the brightest yellow skirt you'll ever see, while Kerber is top-to-toe in tomato red.

Seventh seed Kerber has won the toss and has opted to receive first. 

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First round: Camila Giorgi (ITA) 6-4 7-5 (1hr 45m) 

Second round: Hsieh Su-Wei (TPE) 6-1 6-2 (1hr) 

Third round: Daria Kasatkina (RUS) 6-1 6-1 (44min)

Fourth round: Margarita Gasparayan (RUS) 6-2 6-1 (55 mins) 

Quarter-final: Maria Sharapova (RUS)) 6-4 6-1 (1hr 32m) 

Semi-final: Agnieszka Radwanska (POL) 6-0 6-4 (1hr 4m)

The trophy's arrived on court in Melbourne! It's very shiny...

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...And the players are coming out as well to some thumping pop-dance tunes. Angelique Kerber looks a little overwhelmed by the occasion, but this is second-nature to Serena Williams.   

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Standing in the way of Williams and her record-equalling 22nd Grand Slam title is Angelique Kerber. 

The German 27-year-old is contesting the first Grand Slam final of her career, having previously reached two semi-finals at 2011 US Open and 2012 Wimbledon.

Like Williams, she is bidding to out-do a Steffi Graf record. Graf was the last German woman to win a Grand Slam singles title in 1999.

They're coming for you, Steffi. 

Serena Williams is pretty good at this tennis malarkey, isn't she?

The 34-year-old is a record six-time Australian Open singles champion, and she hasn't lost in a Grand Slam final since 2011.

Has she got room in the trophy cabinet for a couple more?

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Image source, Getty Images

Congratulations go to Britain's Gordon Reid this morning...

The 24-year-old Scot has won his first Grand Slam singles title by beating Joachim Gerard 7-6 (9-7) 6-4 in the wheelchair final in Melbourne.

Reid will hope to add the doubles title when he plays the final alongside his Japanese partner Shingo Kunieda later on Saturday.

You can listen to the Australian Open women's singles final from 08:30 GMT on BBC Radio 5 live, or by clicking on the live tab at the top of this page.

So grab a coffee and come and settle down for a morning of tennis. It's the only proper way to start your Saturday. 

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Remember the early 90s? Hair was big, tracksuits were loud and proud, and this woman was cleaning up all the trophies on the tennis court...

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....and now 20-odd years later, this woman is coming for her record.

Will Serena Williams match Steffi Graf's record of 22 Grand Slam titles? We'll soon find out....

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