Image source, AP

Still plenty of empty seats in what is reportedly a sold-out stadium. Blame the rush-hour traffic. Those that aren't here yet are missing some big-hitting from England. Roy gets in on the action with a club to send an Abbott ball over cow corner for six before pulling a four to a similar area. The England openers are putting the power into the powerplay.

bROCKerz: I'm still unsure on Jordan - he might be wayward, but I still remember his excellent super over v Pakistan! Amazing.

Ben Morgan: England have apparently selected their best XI?? With Chris Jordan in it?? What has he done?? Good fielder but about it.

Tim Williams: Why is Chris Jordan playing today? He is no use to us in next month's World Cup, so playing him now is truly pointless.

Vic Marks
Ex-England spinner on BBC Test Match Special

Image source, Getty Images

"I would almost be frightened if I was the non-striker given how well Hales is hitting the ball."

Hales has tape covering the name and number on his shirt - I'm guessing that is because it actually has another player's details on it. Regardless of whose shirt he is wearing, Hales has set off like a train. He swivels to pull a four off Kagiso Rabada's first ball and picks up further boundaries with a clip off his legs and a straight drive. Hales is seeing it like a beachball. 

England have batted first in each of their last six T20 matches and are undefeated in that span (W5 T1), though three of those wins were by five runs or fewer.

Simon Mann
BBC Test Match Special

"Hales is in tremendous form. What a great way to start for him."

Image source, Getty Images

Alex Hales' last six scores: 57, 99, 65, 50, 112, 78. He is a man in form.

He is quickly into his stride with a pull for four after Jason Roy's first-ball single. He then pulls another for two more. Abbott clearly thinks short is the way to go to Hales. 10 off the over. Good start for the tourists.

Well played that cameraman. The teams are ready to play but he has to scarper quickly when he realises he is the reason we haven't started yet. Thinks he's Spielberg.

There are still some dark clouds in the sky as Kyle Abbott prepares to deliver the first over. The forecast is OK, so hopefully we won't have any unwelcome interruptions. 

Here come the teams. South Africa first, followed by England. National anthems first, then we'll get down to business.

Vic Marks
Ex-England spinner on BBC Test Match Special

"It is a sell out and will sell out at the Wanderers. This tour has been terrific. Everyone has been excited by the cricket, it has been terrific cricket and the crowds are coming in and having a great time."

England lost by 17 runs under the Duckworth-Lewis method in the rain-hit women's international before this match. Report available here.

Vic Marks
Ex-England spinner on BBC Test Match Special

"When teams sit down to look at the England side they will be more concerned about how to get Root, Stokes, Morgan or Buttler out, rather than worrying about the bowlers.

"It is a batsman’s game but at least Morgan has got options. It is not a fearsome attack but with really six front line bowlers, he is never completely short of a bowler."

Zigzag: Swap Billings for Stokes and Jordan for Finn, and that would be my team for the WorldT20

Peterfeet: why why why Jordan again? The new Dernbach contributes nothing but runs to opposition but is undroppable.

South Africa captain Faf Du Plessis on his decision to bat: "Obviously it is the first game of the series and we are not sure what is a good total. The weather came into the decision-making a little but it might be the same for 40 overs.

"We have had no game time but it was just nice to get in the nets and practise T20 skills. 

"It is the first game of series, we have been playing good cricket, it is about getting a little bit of momentum going into the World Cup."

England captain Eoin Morgan: "We would have looked to bowl. I think Duckworth-Lewis might come into it later on. 

"It was nice to get some runs in the warm-up match. I didn't spend a great deal of time in the middle but it was nice to get runs.

"First and foremost the priority is to win these games so we will play our strongest 11. We might change our team due to the surface but today we are playing what we think is our best 11."

Eoin Morgan scored 42 from 13 balls in England's warm-up game against South Africa A.

Image source, AFP

We've had some rain earlier (which caused one disruption before calling a halt to the women's game between South Africa and England), so that is likely to be a factor. Du Plessis admitted his decision to bowl had taken that into account.

Quinton de Kock has a "slight niggle" according to Du Plessis and so he misses out, with AB de Villiers taking the keeping gloves. Eoin Morgan says England have selected what they think is their strongest team.

England: Hales, Roy, Root, Morgan, Stokes, Buttler, Moeen, Jordan, Rashid, Willey, Topley.

South Africa: Amla, De Villiers, Du Plessis, Duminy, Rossouw, Miller, Wiese, Morris, Abbott, Rabada, Tahir.