Eng 11-0published at 1 over
A play and a miss from Danni Wyatt to end the over but it has been a very good one for England.
A pair of boundaries for Dunkley with a wide and no-ball adding to an untidy start from Ismail.
Summary
England comfortably chase 112 with 30 balls to spare in six-wicket win
Dunkley hits 59 - her maiden T20 international fifty
Hosts take unassailable 10-2 lead in multi-format series with two T20s to play
Brunt takes career best 4-15 as Proteas restricted to 111-9
Seamer moves to 102 T20i wickets, equalling England record
Wolvaardt 55; Ecclestone 2-27, Glenn & Sciver 1-18
Watch highlights on iPlayer from 07:00 BST Friday
Eng 11-0published at 1 over
Postpublished at 20:36 British Summer Time 21 July 2022
Georgia Elwiss
England all-rounder on BBC Test Match SpecialBeautiful shot.
Dunkley has that unorthodox grip so she hits the ball into unusual areas. She whacked her hands through it and it raced away.
Postpublished at 20:36 British Summer Time 21 July 2022
Emily Windsor
Southern Vipers batter on BBC Test Match SpecialThe crowd enjoyed that one.
Eng 5-0published at 0.3 overs
Target 112
The next ball from Ismail was a no-ball. Free hit for Dunkley and she cashes in, hammered back past the bowler for four!
Even better! A glorious extra cover drive from Dunkley now, four more. The new England opener is showing what she is all about early on.
Postpublished at 20:34 British Summer Time 21 July 2022
Georgia Elwiss
England all-rounder on BBC Test Match SpecialThe pitch is a good one. I can only remember a handful of balls that kept low. It is a total England should chase.
Eng 0-0published at 0.1 overs
Target 112
And we're off! Good start from Ismail, just back of a length to Dunkley. The England batter nudges it into the leg-side and wants a single before thinking better of it.
Postpublished at 20:32 British Summer Time 21 July 2022
Here they come, Sune Luus has tried to rev up her troops but will know South Africa have got one heck of a task on their hands to defend 111.
Dunkley is out to open for England for the first time and she will take the first ball from Shabnim Ismail.
Postpublished at 20:30 British Summer Time 21 July 2022
Thanks, Callum. Not long until Sophia Dunkley and Danni Wyatt are out there for England.
You'd have to think the home side will knock these runs off quite comfortably.
It might be a good chance for this new-look opening pair to show the aggression that has seen them put together by Heather Knight and Lisa Keightley.
Postpublished at 20:28 British Summer Time 21 July 2022
Right, time for a change in the live text seat.
Sam Drury will take you through England's chase of 112.
Postpublished at 20:26 British Summer Time 21 July 2022
Here are the first three of Katherine Brunt's four wickets as she moved equal with Anya Shrubsole...
Postpublished at 20:25 British Summer Time 21 July 2022
Daniel Norcross
BBC Test Match SpecialEngland require just 112 to win the series. The stars of the show were Brunt and Ecclestone again. Brunt with her best T20 figures of 4-15, she's drawn level with Anya Shrubsole on 102 T20I wickets and the crowd rise to her.
Postpublished at 20:23 British Summer Time 21 July 2022
Alex Hartley
Former England bowler on BBC Test Match SpecialSouth Africa have been poor again, unfortunately. They are ranked higher than England in ODIs but they haven't looked anywhere near them in this series.
Postpublished at 20:22 British Summer Time 21 July 2022
Daniel Norcross
BBC Test Match SpecialThey don't even bother running. Well, they're running now, they're running off.
SA 111-9published at 20 overs
Katherine Brunt sends down a leg-side wide, before Ayabonga Khaka plays the final ball into point for a dot ball.
Brunt finishes with career-best figures of 4-15.
England will need 112 to win the first T20 and win the multi-format series.
Postpublished at 20:21 British Summer Time 21 July 2022
Daniel Norcross
BBC Test Match SpecialRun out coming back for the second. A great throw on the bounce from Sciver, right over the stumps and Klaas was miles out. She had to go for the second run.
WICKETpublished at 19.5 overs
Klaas run out (Sciver) 1 (SA 110-9)
Oh, you don't take on Nat Sciver's arm.
Masabata Klaas comes down the pith and squeezes into the leg side. Sciver comes in from deep mid-wicket and throws to Amy Jones, who whips the bails off.
Klaas isn't even in the picture.
You can't blame them for trying to get two but it was never on.
Postpublished at 20:19 British Summer Time 21 July 2022
Daniel Norcross
BBC Test Match SpecialWhat an extraordinary cricketer Katherine Brunt is.
SA 109-8published at 19.4 overs
Back of the hand slower ball from Katherine Brunt and Masabata Klaas is only able to defend back down the ground to the bowler.
Three dot balls in a row.
SA 109-8published at 19.3 overs
Masabata Klaas tries to pull Katherine Brunt away with bottom edges into the pitch.
Another dot ball.
SA 109-8published at 19.2 overs
Masabata Klaas blocks Katherine Brunt back down the pitch.
Dot ball.