Bangladesh bowled out for 233 to lose by 149 runs
Mahmudullah makes excellent 111 off as many balls to defy South Africa
South Africa post imposing 382-5 after late flurry
De Kock hits sublime 174 off 140 balls - highest score in tournament
Klaasen smacks 90 off 49, Markram adds 60 off 69 & Miller cracks 34* off 15
Proteas move up to second in the table, Tigers now bottom
There is no stopping Quinton de Kock now! He hammers the next ball over extra cover for four before working a single from the last to keep strike.
I don't think the Bangladesh bowlers will be queuing up to bowl the next over.
Jonathan Agnew
BBC cricket correspondent on Test Match Special
Shakib is going here. He doesn't look very happy.
SA 278-3
Six more! Quinton de Kock goes to his 150 in style!
He swings this one over the leg side and into the crowd. He reaches his latest milestone from 129 balls.
What a knock this has been.
Jonathan Agnew
BBC cricket correspondent on Test Match Special
That is another mighty hit. I don't know where Quinton de Kock is summoning the strength from.
Shakib Al Hasan is miffed after being called for a very harsh wide and Quinton de Kock adds to his frustrations by pumping the ball over long off for another big six.
That brings up the 100 partnership from 70 balls.
De Kock 137, Klaasen 43
No luck needed for that one - Quinton de Kock launches the ball high over mid-wicket!
A fifth six of the innings for the South Africa opener. He must be tiring now but he's hiding it pretty well with shots like that if he is.
After batting for as long as he has in this heat, Quintion de Kock is due a bit of luck and he gets it.
He tries to pull Shoriful Islam but gets an under-edge that sends the ball whistling just past his leg stump and away for four.
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I agree with Risbo 12.04. England hosted in 2019 and won. Australia hosted in 2015 and won. Runners up were NZ who co-hosted but the final was in Australia. India hosted in 2011 and won. Runners up were Sri Lanka who co-hosted but the final was in India. Home advantage is killing ODIs, add to this the format and the World Cup is in trouble too. Six weeks of group stage, followed by just three games in four days of knockout, which is where the proper games take place. I really hope for the future of the World Cup that India don't win it (nothing against India) and that they really think about the format going forward.
Raymond, Croydon
Three singles end the over and that gives South Africa exactly 10 from it.
Same again for the next nine overs will get them to 337. I'd imagine they'll want a few more than that.
Slower ball from Mustafizur Rahman but that's not deceiving Quinton de Kock.
He waits for it and heaves the ball through the leg side for four.
That takes him past Virat Kohli and to the top of the run-scoring charts for the tournament.
Steven Finn
Former England bowler on BBC Test Match Special
The issue if you fail to take wickets in those middle overs means you leave your bowlers under serious pressure at the back end of the innings, especially against this South Africa side with the batters they have.
Thanks, Callum.
This is all set up for another big finish from South Africa and it'll need to be if they're to get up to the 350 mark.
That said, 10 or 11 an over is well inside the range of this batting line-up. Bangladesh's bowlers are going to have to be at their very best to restrict the Proteas.
Heinrich Klaasen follows that six with a thumping drive back over Hasan Mahmud's head for four more.
He's up to 40 off 29 balls and I wouldn't rule out another century.
To see if he gets there, here's Sam Drury to talk you through it.
Prakash Wakankar
BBC Test Match Special commentator
Heinrich Klaasen has got his battery charged, got his eye in and is ready to go on the rampage.
Is this the indication that the foot is being put on the accelerator?
Heinrich Klaasen just effortlessly flicks Hasan Mahmud over mid-wicket for a third six.
If you go to a South Africa game and sit at mid-wicket, beware with Klaasen around. He loves to pepper that region.
Prakash Wakankar
BBC Test Match Special commentator
We have to be careful where we are broadcasting because if Heinrich Klaasen decides he wants to hit a straight six we are in trouble.
A rare boundary off the pace as Quinton de Kock slices Mustafizur Rahman over mid-off.
Once it clears the man there it races away to the boundary.
South Africa seem pretty intent to just keep ticking along at the moment.
Steven Finn
Former England bowler on BBC Test Match Special
South Africa are just starting to think about really going for it.
Quinton de Kock has never left that run-a-ball position, which is fine. But with that platform laid and with the batting power to come, they have to start moving now if they want to get beyond 350.
The TMS team were just praising Bangladesh for their fielding effort but this isn't great.
Quinton de Kock sets up for the reverse sweep and two fielders start to turn, anticipating running after it, but he cloths it up in the air.
That means the fielders are left scrambling to get there and don't manage to. Could they have brought out the dive? I think so, but it doesn't come.
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Risbo (see 12:04 BST) - did you watch India vs New Zealand game on Sunday? Pakistan vs Sri Lanka? Yesterday's game? It’s the case in most Cricket World Cups, the five to six top teams, when pitted against each other, do provide a decent spectacle.
Pite in Leicester