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Australia win by six wickets to book semi-final spot
They will top Group 1 and play second place from Group 2 in last four
All-rounder Tahlia McGrath hits 57 off 33 balls to see Australia to victory
South Africa must beat Bangladesh in final game and hope Sri Lanka lose to New Zealand to qualify
Australia opener Alyssa Healy rested due to soreness in her left quad
Right, national anthems have been sung.
South Africa's right-handed batters Laura Wolvaardt and Tazmin Brits walk out to the crease and Australia's seamer Megan Schutt has the ball in her hand.
What are your thoughts? Will South Africa benefit from being at home? Will Australia crumble without key player Alyssa Healy? Get in touch via #bbccricket
And some from South Africa's previous game against New Zealand...
Here is some of the action from Australia's previous game...
South Africa XI: Laura Wolvaardt, Tazmin Brits, Marizanne Kapp, Sune Luus(c), Chloe Tryon, Delmi Tucker, Nadine de Klerk, Sinalo Jafta (wk), Shabnam Ismail, Masabata Klaas, Nonkululeko Mlaba.
Australia XI: Beth Mooney(wk), Meg Lanning(c), Ellyse Perry, Tahlia McGrath, Ashleigh Gardner, Grace Harris, Georgia Wareham, Annabel Sutherland, Alana King, Megan Schutt, Darcie Brown.
South Africa captain Sune Luus: "It was a good toss to lose, we were leaning towards the batting side so it doesn't really matter for us.
"We 100% expect it to zip around tonight. It looks a really good wicket so it should suit our seam bowlers and theirs too.
"The turnouts have been amazing in this tournament and it should be the same tonight."
Australia's captain Meg Lanning: "We're going to have a ball, the wicket looks good and hopefully we can get a good start.
"Alyssa Healy is out with a quad strain. It's only precautionary and won't be available for tonight.
"Beth Mooney will take the gloves.
"South Africa have got some class players and we're looking forward to it."
Australia's captain Meg Lanning won the toss and has opted to bowl.
Let's start with some news of the toss...
Image source, Getty ImagesEarlier today England beat India to close in on a World Cup semi-finals spot.
If you missed out on the action you can read Ffion Wynne's report here.
The BBC weather forecast predicted a 0% chance of rain however we have already seen some light showers today during England's game.
Play was uninterrupted though and it should be same during this game too. You can see the full forecast here.
Hello and welcome to the eighth day of the ICC Women's World Cup in St George's Park, Gqeberha.
Today the host nation South Africa take on defending champions Australia.
South Africa, who have won one of their two games, will have their eyes on a victory to increase their chances of securing a place in the semi-finals.
However, unbeaten Australia will be looking to secure a win to finish at the top of Group 2 and head into the semi-finals.