Alex Hartley
Former England bowler on BBC Test Match Special

We were talking about Sri Lanka's over-rate. South Africa have bowled three in 20 minutes.

A pair of tasty-looking straight drives from Kusal Mendis in Lungi Ngidi's second over which go straight down the ground and go for four.

Quinton de Kock is off the field so Heinrich Klaasen has the wicketkeeper's gloves at the moment.

Marco Jansen has a steely look. He's hungry for wickets.

A rasping short ball towards the end of the over has Kusal Mendis taking evasive action.

Jonathan Agnew
BBC cricket correspondent on Test Match Special

The graphic makes it look like it's gone over by a distance, but it's probably only a millimetre.

Kusal Mendis is saved by the ball-tracking technology which determines the trajectory of that delivery from Marco Jansen would have taken it over leg stump.

Does Marco Jansen have two in two?

He strikes Kusal Mendis on the back pad and Richard Illingworth raises his finger.

However, the Sri Lanka batter elects to review.

Alex Hartley
Former England bowler on BBC Test Match Special

You don't get better than that as a left-arm seam bowler - exactly the delivery you want to bowl.

That would get 95% of players out at this World Cp.

Jonathan Agnew
BBC cricket correspondent on Test Match Special

That's a classic left-armer's dismissal. A beauty.

The worst possible start for Sri Lanka.

Two slips for Lungi Ngidi in place.

His third ball hits hits Kusal Perera on the pad which prompts a somewhat theatrical appeal from the South African seamer.

Thanks, Mike.

Without further ado South Africa's players are already out there ready for Sri Lanka's innings. Lungi Ngidi has the ball in hand at the top of his mark.

Pathum Nissanka is on strike for Sri Lanka. Kusal Perera is stood at the non-striker's end.

"Play" is the call from the umpires.

While we wait for the two teams to re-emerge in Delhi, I'll pass you over to a man who most definitely can traverse a pool without somehow headbutting the wall - it's Timothy Abraham.

Meanwhile there's intriguing news out of the Australian camp, with Adam Zampa sustaining a facial injury while swimming in the hotel pool.

The 31-year-old was seen with cuts to his face during training before Sunday's game against India in Chennai.

"He swam into the pool wall," said Australia captain Pat Cummins.

"He said he had his eyes closed and thought he was swimming in a straight line and swam into the step in the pool. He's all good, just a bit sore."

The leg-spinner is fit to play, and you'll be able to catch coverage of that match tomorrow from 9:30 BST.

Two World Cup records fell in the South African innings as Aiden Markram made the fastest century in World Cup history, his 49-ball century beating Kevin O'Brien's 2011 effort against England by one ball.

South Africa then recorded the highest score in a World Cup match, passing Australia's 417-6 against Afghanistan in Perth in 2015 in the penultimate over, going on to set a new record of 428-5.

South Africa centurion Rassie van der Dussen: "It was a perfect day for for us with the bat. We had to work hard up front up against the swinging ball and then well into the middle overs. We have a blueprint to set it up for the guys in the middle order. Aiden Markram when he plays like that is incredible to watch.

"We just try to play the conditions and Quinton de Kock and I batted fairly normally at the start. If we can give a chance to the guys coming next we know what they can do. We have some of the best finishers in the world.

"But the game is only halfway done. Our bowlers will have taken lessons from the way they bowled. It's a good outfield and wicket so the game is not done and dusted."

Three superb centuries in the South African innings as Quinton de Kock, Rassie van der Dussen and Aiden Markram feasted on the Sri Lankan bowling.

Here's some of the best of their landmark scores.

Henry Moeran
BBC Test Match Special commentator

It has been a pretty chastening day for Sri Lanka's players in the field.

South Africa's total of 428-5 is the 10th highest ever in men's ODI cricket, pushing out the 418-5 they made against Zimbabwe in September 2006 to break into the top 10.

Steven Finn
Former England bowler on BBC Test Match Special

That is a truly mammoth total from South Africa.

A good finish from Madushanka, holding this Sri Lankan pair to four singles from the last four deliveries.

Jansen drops to one knee to drive the final ball down the ground, but it's cut off at the boundary.

A remarkable innings comes to an end.