The Aussies will be happy with their start. It should settle the nerves just a little. They've got an excellent sound system at Junction Oval. The music is booming between overs.

Shot. Beth Mooney is looking good early. Tahuhu tries a bouncer but left-hander Mooney is on it quickly and pulls to square leg for four more.

Straight away Tahuhu is up at 75mph but the line is not right. Beth Mooney gets on the front foot and uses the width to hit the first boundary of the match.

Kristen Beams
Ex-Australia leg-spinner on BBC Test Match Special

This could be about which team settles first - I'm nervous just sat in the commentary box. It's about winning this first powerplay for now.

Seamer Lea Tahuhu, the liveliest bowler in the New Zealand attack, will share the new ball.

Kristen Beams
Ex-Australia leg-spinner on BBC Test Match Special

There's more pace in this wicket than we first thought.

Alyssa Healy is going to take this pressure situation on. The opener goes again, chipping the ball narrowly wide of mid-on.

It has been an aggressive start from Australia's star opener.

Kasperek starts with a half-tracker that Healy tries to give a good thwack. She doesn't get all of it and it's probably a good job too. The ball bounces once before reaching the fielder in the deep.

So it'll be Alyssa Healy and Beth Mooney opening for the Aussies.

Healy hit 83 in the last game against Bangladesh.

Leigh Kasperek will take the new ball. The DJ is certainly getting the atmosphere going.

Kristen Beams
Ex-Australia leg-spinner on BBC Test Match Special

I think Australia will be looking for a score around the 150 mark, as a minimum.

A big cheer at the end of Advance Australia Fair.

The pressure is on.

Who will come out on top in what is effectively a quarter-final between two great rivals? We'll find out over the next three hours.

The New Zealand anthem is great, isn't it?

The White Ferns have plenty of support in Melbourne.

The players are out on the field.

It's time for the anthems...

Defending champions Australia are still favourites for this game but it'll certainly be no straight-forward task.

New Zealand are a good side and will fancy their chances. White Ferns have a strong top three and a star teenage leg-spinning all-rounder in Amelia Kerr.

The weather looks perfect in Melbourne so we're all set for a bumper afternoon.

• Beat Sri Lanka by seven wickets
• Lost to India by four runs
• Beat Bangladesh by 17 runs

• Lost to India by 17 runs
• Beat Sri Lanka by five wickets
• Beat Bangladesh by 86 runs

India are through to the last four. Sri Lanka and Bangladesh are out. It's winner takes all here at the Junction Oval.

England booked their place in the last four yesterday. South Africa have secured a top two spot in Group B too.

Image source, ICC

Australia XI: Alyssa Healy (wk), Beth Mooney, Meg Lanning (c), Ashleigh Gardner, Ellyse Perry, Rachael Haynes, Annabel Sutherland, Nicola Carey, Jess Jonassen, Delissa Kimmince, Megan Schutt.

NZ XI: Sophie Devine (c), Rachel Priest (wk), Suzie Bates, Maddy Green, Hayley Jensen, Katey Martin, Amelia Kerr, Anna Peterson, Leigh Kasperek, Lea Tahuhu, Rosemary Mair.

Australia Meg Lanning: "I wasn't too bothered [about the toss]. I am happy to lose. It looks a good wicket and I don't think it will change too much during the day.

"It is a massive game. It is really exciting. Hopefully it is a great contest."

New Zealand captain Sophie Devine: "The pitch won't change too much and I think we've bowled well in recent games so hopefully we can put the Aussies under pressure. Our fielding too is something we've worked really hard on and now it's the bat which we need to improve on."