SA 158-5published at 15.2 overs
Andile Phehlukwayo is doing his bit too. Clubbing Richard Gleeson away for successive boundaries.
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
Andile Phehlukwayo is doing his bit too. Clubbing Richard Gleeson away for successive boundaries.
South Africa are actually two runs ahead of where England were at the same stage - but they have lost two more wickets.
Stubbs needs to do a Jonny Bairstow.
Colin Ingram
Former South Africa batter on BBC Two
The confidence you take out of an innings like this - hopefully Tristan Stubbs will go from strength to strength.
Tristan Stubbs nudges a single to bring up his fifty from just 19 balls.
I think we are going to hear a lot more about this kid in the coming years.
Isa Guha
Former England bowler on BBC Two
Excellent effort from Liam Livingstone. But that's another six to Tristan Stubbs.
If Liam Livingstone was eight foot tall he might have got that.
Tristan Stubbs pulls it to the mid-wicket boundary, Livingstone is diving at full stretch but it disappears over for another maximum.
Or perhaps not! That's lovely timing from Andile Phehlukwayo as he drives Reece Topley away for four.
Great shot.
Andile Phehlukwayo is the new batter. If I were him I would just let Tristan Stubbs have the strike as much as possible.
98 runs from 36 is the equation.
Isa Guha
Former England bowler on BBC Two
Adil Rashid does not panic. He's so used to playing against powerful batters.
James Anderson
England bowler on BBC Two
England have been faultless in the field. Good response from Adil Rashid - he has taken some tap in this over.
Miller c Jordan b Rashid 8 (SA 136-5)
The skipper goes!
A single brings David Miller on strike and the South Africa captain looks to join the party but only succeeds in picking out Chris Jordan at long-on.
Isa Guha
Former England bowler on BBC Two
Oh. My. Word.
That might be the biggest six of the night.
I think that one has landed in Cardiff.
Another gigantic six from Tristan Stubbs as the ball disappears out of the ground!
Ha, that is outrageous.
Tristan Stubbs is back on one knee as he gives himself some room outside off stump and smashes Adil Rashid through extra cover for four.
Isa Guha
Former England bowler on BBC Two
This boy can play.
What a shot that is. It isn't the worst delivery in the world from Chris Jordan but Tristan Stubbs, almost dismissively, pulls him for another huge six.
I don't think he will be relatively unknown for long if he keeps batting like this.
Colin Ingram
Former South Africa batter on BBC Two
Tristan Stubbs is relatively unknown. He's only played 20 or so T20s but he's made his mark with fast knocks.
He is a really exciting prospect for South Africa and this is his chance to stake a claim.
Isa Guha
Former England bowler on BBC Two
That is an incredible shot!
Target 235
Three sixes in the over! Tristan Stubbs gets down on one knee at clatters it over for another maximum.