Kenin canters forward, chance to put the point away... but jabs the volley back into the Spaniard's path, luckily for the 21-year-old her opponent can't get full strings on it.

40-30.

Kenin, the 14th seed, bounces around the back of the court but sticks a little too much oomph on a forehand to let Muguruza on the board.

The American goes deep with another, Muguruza will challenge... and she's right.

15-30.

A hold to settle the nerves for the two-time Grand Slam champ. As you were...

Better from the Spaniard, setting the foundations for a winning volley with a powerful serve. Three quick points and it's 40-30.

Sofia Kenin has come absolutely flying out of the blocks here... fantastic ground-strokes with depth and speed, Garbine Muguruza hasn't got to grips with it yet. 0-30.

Marion Bartoli
Former Wimbledon champion on BBC Radio 5 Live

It's been a really slow start by Garbine Muguruza. I'm not sure that face when she entered the court helped her.

Image source, Getty Images

Pat Cash
Former Wimbledon champion on BBC Radio 5 Live

When the ball is low and slow Kenin goes for a single-handed backhand or drop-shot.

She is so fast between points.

Cracking start for the 21-year-old American. Looking confident.

Jonathan Jurejko
BBC Sport at Melbourne Park

Garbine Muguruza emerged first from the long corridor, lined by LED screens bearing the names of previous champion, which arcs around from the locker room to Laver.

Image source, BBC Sport

Sofia Kenin followed a few seconds later, waving to the crowd before marching straight past the trophy she is hoping to lift later.

Image source, BBC Sport

Garbine Muguruza looks to have control of the baseline but a deep, punchy backhand from Sofia Kenin forces the Spaniard into the net, and then the American shows off her whole arsenal with a delicate drop shot. 40-0.

Here we go...

Sofia Kenin will serve first.

Image source, .

Image source, Getty Images

Garbine Muguruza is bidding to become only the third unseeded woman to win the Australian Open, after home player Chris O'Neil in 1978 and American great Serena Williams in 2007.

The Venezuelan-born Spaniard slipped to 36th in the world at the end of last year, a little over two years after she was ranked number one.

She has since started to climb again, beating three top-10 players en route to the final, and hopes the experience of winning the sport's biggest prizes gives her an advantage

"It's something that not a lot of players can feel it. But at the end the racquet has to speak out there," she said.

"It doesn't matter how many Grand Slams you have. It's a tennis match.

"Even if you have 15 Grand Slams, you go out there and you have somebody that can beat you."

Marion Bartoli
Former Wimbledon champion on BBC Radio 5 Live

Garbine Muguruza was really looking tense when she came on court - she almost didn't look like she was enjoying the moment. It reminds me the year I lost Wimbledon (2007), I had that face.

If Muguruza doesn't have a good start her team knows how to win a Slam.

Image source, Reuters

Sofia Kenin, who was born in Russia but moved to the United States when she was a few months old, is the first American to reach the Australian Open final aside from the Williams sisters since Lindsay Davenport in 2005.

She was a child prodigy in the States, making numerous television appearances and hitting with Grand Slam champions like John McEnroe, Kim Clijsters and Venus Williams when she was young and going on to reach the 2015 US Open girls final.

She won the WTA award for the most improved player in 2019 after winning three titles and climbing more than 40 places in the world rankings.

"You don't experience this so often. This is so exciting. Literally butterflies," she said.

"I'm just going to also focus on what I need to do, focus on my game. I got here, it's time to shine, do the best I can. Hopefully I can do something more special."

Jonathan Jurejko
BBC Sport at Melbourne Park

With the rain still sailing down outside, the Laver roof has been firmly shut all day.

It is also closed on Margaret Court Arena next door, where fans with grounds passes are able to go and watch the match on the big screen.

Image source, BBC Sport

Image source, Getty Images

Garbine Muguruza's coach Conchita Martinez, who coached the Spaniard during her Wimbledon title-winning run in 2017: "I think she has the right attitude at the moment. She's very focused.

"I have seen this look before when she's been playing really good tennis."

On Kenin: "She's a great player, very good fighter.

"She strikes the ball good. She is aggressive. So the key is going to be to stay with her, to stay aggressive, try to be the one in command.

"It's not going to be easy, but hopefully Muguruza can do it."

Will this be a straightforward win for two-time Grand Slam winner Garbine Muguruza?

Or does Sofia Kenin have one more surprise up her sleeve?

Image source, Getty Images