Image source, Getty Images

Terry: Pure class from Sciver-Brunt. Perfect platform for 200 now.

Laura Wolvaardt turns to Shabnim Ismail to break up this partnership.

England are back in the lead on the WinViz scale...

Image source, Cricviz

A decent over by Nonkululeko Mlaba - who has struggled with her line today. Just three runs off it.

Firdose Moonda
Cricinfo journalist on Test Match Special

Image source, Reuters

South Africa like chasing, it is how they beat India 4-1 in the series back home before this tournament. It is where they feel they can control the pace of the match when they're chasing.

After a short drink breaks, Nonkululeko Mlaba continues. You can see from the South Africa body language how desperate they are for a breakthrough.

Image source, Getty Images

Seb: Nat Sciver-Brunt is the female equivalent of Ben Stokes. She is here, there and everywhere and knows when to turn it on in big occasions.

Matthew Henry
BBC Sport journalist at The Oval

There are people standing around The Oval to applaud Nat Sciver-Brunt's fifty. She holds her bat in the air like a warrior. One leg or not. Some knock.

Alex Hartley
Former England bowler on Test Match Special

Nat Sciver-Brunt has played so well. This is why England did everything to get her back on the park. To have the captain back, and she is leading from the front again.

50 for Sciver-Bruntpublished at 14 overs

14 overs

Eng 113-3

The way Nat Sciver-Brunt executes the ramp shot is something else. Up and over the wicketkeeper for four.

And then she brings up her half-century with a sublime drive through the off side for another boundary.

She's on 53 off 35.

Horrible appeal from Nadine de Klerk. Heather Knight is so far outside off stump when she's struck low on the front pad.

A full toss is given the treatment it deserves as Nat Sciver-Brunt sweeps for four.

Charles: Harry Kane last night, Nat Sciver-Brunt and Heather Knight tonight. The old guard to England’s rescue.

100 up for Englandpublished at 13 overs

13 overs

Eng 100-3

Image source, Getty Images

Nine from the over as England reach triple figures. This partnership is worth 77 off 58 balls.

Alex Hartley
Former England bowler on Test Match Special

Image source, Reuters

An unbelievable effort from Nadine de Klerk. Soon as Heather Knight hit it, I thought it was going for six, but it just plugged in the grass and trickled towards the boundary sponge.

The way these two have run between the wicket has been impressive. There's a real understanding between them.

Heather Knight goes up and over extra-cover for four, despite an acrobatic diving effort from Nadine de Klerk in the deep.

This looks better for England, too...

Image source, Cricviz

Jem Green
CricViz data analyst

Nat Sciver-Brunt and Heather Knight are two of the best batters to have at the crease in this situation. Their wealth of experience is reflected in their career T20I dot ball percentage, and they will keep the scoreboard ticking over.

Of all batters to have scored more than 1,000 T20I runs, they both feature in the top five for the lowest dot ball %:

• Perry (Aus) 30.9%
• Kaur (Ind) 32.1%
• Knight (Eng) 32.4%
• Rodrigues (Ind) 32.5%
• Sciver-Brunt (Eng) 33.0%

Four more. Heather Knight waits patiently back in her crease and cuts it down to the third boundary.

Momentum firmly with England now.

Alex Hartley
Former England bowler on Test Match Special

Image source, Getty Images

It is that risk and reward. South Africa have used Marizanne Kapp, who was so good in the powerplay. She was outstanding, but she is bowled out now and England's batters can relax a little bit.

Lovely! Nat Sciver Brunt sets herself up early and ramps Ayabonga Khaka for four.

England are finding the boundaries and working the ones and twos.