SA 67-2published at 7 overs
Richard Gleeson is bowling at 92mph but this is too short and Heinrich Klaasen is able to pull through mid-wicket for four.
Klaasen has raced on to 18 from 11 balls, with Reeza Hendricks 43 from just 23.
SA 193-8: Stubbs 72 (28), Hendricks 57 (33); Gleeson 3-51
Eng 234-6: Bairstow 90 (53), Moeen 52 (18); Ngidi 5-39
Bairstow hits 90 to continue sublime summer
Moeen bashes fifty off 16 balls - England's fastest fifty in T20s
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First T20, Bristol
Tom Mallows and Matthew Henry
Richard Gleeson is bowling at 92mph but this is too short and Heinrich Klaasen is able to pull through mid-wicket for four.
Klaasen has raced on to 18 from 11 balls, with Reeza Hendricks 43 from just 23.
Phil Tufnell
Former England spinner on BBC Two
The runs are starting to come here for South Africa...
Now it is Heinrich Klaasen's turn as he powers the ball wide of a diving Adil Rashid at mid-off for four.
South Africa are motoring here. Maybe we have a game on after all?
James Anderson
England bowler on BBC Two
That can be the downside to bowling 90mph...
Isa Guha
Former England bowler on BBC Two
Hello! My word! That is out of the ground!
Out of the ground! Reeza Hendricks is onto it in a flash and smashes Richard Gleeson for an enormous six.
Reece Topley doing Reece Topley things.
Phil Tufnell
Former England spinner on BBC Two
Chris Jordan isn't happy with himself. That was a good over for South Africa.
Chris Jordan struggling with his line and length here as he drifts down leg and Heinrich Klaasen can flick it away fine for four.
14 off the over and that is the South Africa 50. A decent recovery after the loss of those two early wickets.
And another. This time a lovely, wristy shot by Reeza Hendricks through mid-wicket.
Oof. Chris Jordan gets the yorker wrong and Reeza Hendricks clubs it back over his head for four.
Another bowling change. Here's Chris Jordan.
Andy Zaltzman
BBC Test Match Special statistician
This would be the third-highest successful chase in T20 international history and South Africa's highest.
The highest successful one against England was by India when they chased down 199 on this ground four years ago.
Ebony Rainford-Brent
Former England batter on BBC Two
Richard Gleeson is bowling gas here and South Africa look all over the shop against him.
Another edge! Richard Gleeson is bowling at 90mph here as he finds Reeza Hendricks' edge, but the ball flies where first slip would be for a streaky four.
That's better from Hendricks though as he clatters the ball through backward point for another boundary.
Chris Woakes
England all-rounder on BBC Two
It does look like there was bat on it...
...he nicked it onto his leg.
Richard Gleeson is on the money first up...and has Heinrich Klaasen nicked that? Ultra Edge showed he has - but Jos Buttler is wrongfooted and cannot get near the catch.
That's a good response from Reece Topley, with just four singles off it featuring a fine stop by Jason Roy at backward point.
England looking more on it in the field than South Africa did.
Ebony Rainford-Brent
Former England batter on BBC Two
There is no noise whenever there is a boundary for South Africa. I think there might be one South Africa fan in the ground.
Textbook.
Heinrich Klaasen leans into a beautiful cover drive that fizzes away for four.