SA 60-2published at 14 overs
South Africa are dealing in singles at the moment, with four coming off Mehidy Hasan's latest over.
Mehidy is 1-25 from seven overs so far.
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
Callum Matthews, Tom Mallows and Sam Drury
South Africa are dealing in singles at the moment, with four coming off Mehidy Hasan's latest over.
Mehidy is 1-25 from seven overs so far.
No issue with the over rate at the moment as Shakib Al Hasan races through his second set of six.
It looks very, very hot out in Mumbai.
We have just a shot of former South Africa bowler and current Bangladesh bowling coach Allan Donald on the boundary with a towel wrapped in ice around his neck. Sure the players out in the middle will want one of those during the drinks break.
Speaking of Mehidy Hasan, he continues to be miserly, with just two singles coming from his latest over.
Bangladesh are doing a decent job of subduing this powerful South Africa batting line-up.
Here is the second wicket to fall as Mehidy Hasan traps Rassie van der Dussen bang in front.
Shakib Al Hasan brings himself on and bowls five tight deliveries, before dropping slighlty short with his final ball that allows Aiden Markram to rock back and play a lovely cut shot wide of the fielder at point.
Great delivery and great celebration from Shoriful Islam as he cleans out Reeza Hendricks' stumps.
Mehidy Hasan is racing through his overs, he is 1-19 from his five already.
There is a brief flurry of excitement as Shakib Al Hasan spills a shot from Aiden Markram in the covers, but replays show it was a bump ball.
Quinton de Kock has looked in good touch despite the loss of two wickets at the other end.
Bangladesh are jubilant now as stand-in skipper Aiden Markram joins former skipper Quinton de Kock in the middle.
Markram gets off the mark with a thick edge off a loose cover drive that flies away for a rather fortuitous boundary.
Nervy times for South Africa.
Prakash Wakankar
BBC Test Match Special commentator
This is a very, very good start by Bangladesh now.
Van der Dussen lbw b Mehidy 1 (SA 36-2)
Now Rassie van der Dussen goes!
A slightly quicker, straighter delivery from Mehidy Hasan traps Van der Dussen in front on the back foot.
Van der Dussen had a chat with Quinton de Kock over a possible review, but decided against it and trudged back to the boundary.
There was a brilliant dancing celebration from Shoriful Islam after that Hendricks wicket. I'm sure Tanzid Hasan felt like dancing too, having dropped the South Africa opener earlier.
Rassie van der Dussen is the new batter.
Steven Finn
Former England bowler on BBC Test Match Special
Lovely delivery. As a left-armer in the powerplay you want to be challenging the stumps and pads of the opener and that is what he's done. It just moved back a little bit and Reeza Hendricks' feet weren't as committed to the shot as they could have been because of the movement.
Prakash Wakankar
BBC Test Match Special commentator
That is a peach of a delivery. It moved a shade off the seam.
Hendricks b Shoriful 12 (SA 33-1)
Bangladesh hit back as Reeza Hendricks goes!
It is a lovely teasing length that tempts Hendricks forward but the ball nips back off the seam, escapes his defences and cannons into the stumps.
Steven Finn
Former England bowler on BBC Test Match Special
That is a lovely shot. It is the drift in that means it is easy for him to hit over long-on because there is no spin and it is straight off the middle of the bat.
Hello. Quinton de Kock has absolutely crunched the ball over long-on. Great shot.
There is another change of bowling as Shoriful Islam enters the fray, with Quinton de Kock finding the boundary with a lovely clip off the pads.
De Kock is making his 150th ODI appearance for South Africa.
Reeza Hendricks should really be back in the hutch by now.
Mehidy Hasan Miraz races through his second over, with just four singles coming off it.
There is a sparse crowd at the Wankhede Stadium, as we have seen a lot at this World Cup so far. But it may fill up as conditions cool later in the day.