Simon Mann
BBC Test Match Special commentator on BBC Radio 5 Sports Extra

This could be a freak wicket.

Well, well, well.

David Bedingham pops one up to Travis Head at short leg, who takes a brilliant reaction catch off his foot - or has it hit the ground?

Steven Finn
Former England fast bowler on BBC Radio 5 Sports Extra

That's wonderful.

Pat Cummins is now going for off-cutters, trying to hit the pad. He's started to chase wickets because he has no other choice.

All class.

David Bedingham takes the target to below 20 with an exquisite on-drive for four off Pat Cummins.

Frame it.

Aiden Markram's calmness has been astonishing. Considering the situation, he's controlled the whole morning despite a couple of wickets falling either side of drinks and the fact that runs aren't exactly flowing.

David Bedingham tickles one round the corner off Nathan Lyon and Markram immediately yells for three, and they sprint through comfortably.

South Africa have only hit two boundaries today.

Australia have given them nothing.

I'm not sure that's going to help the nerves of the South Africa fans, Jim.

Jim Maxwell
BBC Test Match Special commentator at Lord's

There are probably not enough runs for Australia to defend now. Six wickets in hand, South Africa should do this.

Image source, Cricviz/BBC

Firdose Moonda
Cricinfo's South Africa correspondent on Test Match Special

Image source, Getty Images

What a big occasion for Aiden Markram. Yesterday, a lot of the talk was about if this would be the most decisive innings in recent Test history for South Africa.

Test cricket like this on a Saturday morning, what more could you want?

Pat Cummins brings the fielders in around the bat for Nathan Lyon, heaping the pressure on new batter Bedingham. He's equal to it, though, giving himself a bit of room and taking a single out to deep cover.

The run rate isn't electrifying but every ball feels like a contest.

Three stinking reviews from Pat Cummins this morning.

Five from the over as well, and that's a big win for South Africa.

Impact outside the line.

No reviews left. Headingley 2019, anyone?

Jonathan Agnew
BBC Chief Cricket Commentator on Test Match Special

It didn't get as high as the batsman thought, it was a sort of cramped pull shot.

Not another one?!

Yep, Australia are going to use their last review. David Bedingham plays across the line to Starc and the ball stays low, trapping him on the front pad.

Alex Carey is very confident.

Roars of delight from the South Africa-heavy crowd - that's how it sounds, at least.

Aiden Markram is denied a boundary by a sprawling Marnus Labuschagne at cover, before David Bedingham guides the next ball to deep third and they hurry back for three.

Nathan Lyon whizzes through a maiden.

South Africa can't afford to let too many of them build up.

These Aussies, eh?

They're fired up now. Mitchell Starc fizzes one past David Bedingham's outside edge first up.

Play that.

Jonathan Agnew
BBC Chief Cricket Commentator on Test Match Special

Image source, PA Media

This is some lovely bowling from Mitchell Starc.