SA 63-1published at 15 overs
Markram 29, Mulder 27
Aiden Markram brings up the fifty partnership, pushing Nathan Lyon's delivery down to long on for a single.
Wiaan Mulder then crunches a four through the covers, his fifth of the innings.
South Africa set target of 282 after Australia bowled out for 207
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Mulder chips Starc to cover after fifty stand with Markram
Smith goes to hospital with dislocated finger after dropping Bavuma
Elizabeth Botcherby and Mike Peter
Markram 29, Mulder 27
Aiden Markram brings up the fifty partnership, pushing Nathan Lyon's delivery down to long on for a single.
Wiaan Mulder then crunches a four through the covers, his fifth of the innings.
Simon Mann
BBC Test Match Special commentator on BBC Radio 5 Sports Extra
There was a genuine edge, moving away from Alex Carey, might have been half a chance.
Edged just in front of the keeper!
Pat Cummins finds the outside of Aiden Markram's bat and the ball drops just short of a diving Alex Carey before flying away for four.
A few rueful looks in the cordon but I'm not sure you can count that as a chance.
Simon Mann
BBC Test Match Special commentator on BBC Radio 5 Sports Extra
South Africa have got a lot to do but they've done a cracking job so far.
Jim Maxwell
BBC Test Match Special commentator at Lord's
We know how the mood changes after a wicket had been lost but this partnership is going ok at the moment.
Target 282
Fifty up for South Africa, as Wiaan Mulder knocks Nathan Lyon for a single into the covers.
We now haven't had a boundary in 26 overs, after eight were scored in the first nine overs of day three.
The players are taking drinks as we reach the halfway point in the session.
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Re: Cummins - coming on at first change can be a help to swing bowlers. Ian Botham did that and bagged 383 Test wickets.
Martin, New Forest
Andy Zaltzman
Test Match Special statistician
South Africa's highest successful run chase was 414 in Perth in December 2008.
Sir Alastair Cook
Ex-England captain on BBC Radio 5 Sports Extra
We're starting to see the squeeze from Australia. South Africa were scoring very easily to start off with but as the balls got softer, their scoring has slowed down.
Change of ends for Pat Cummins as he replaces Josh Hazlewood.
A second tight over, with Aiden Markram scoring the only run off the bat, pushing the ball to Nathan Lyon at mid-off and beating his throw at the non-striker's end.
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I think chasing 282 is certainly on the cards, this is only a day three pitch and a lot better batting conditions than previously. All it will take is one or two of the SA batters to get a score and they're most of the way there!
Josh, North London
Andy Zaltzman
Test Match Special statistician
If South Africa are successful, it will be the joint-highest successful run chase at this ground.
England successfully chased against New Zealand in 2004 and the West Indies chased against England in 1984.
Indeed, here is Nathan Lyon, coming on to replace Pat Cummins with the Australian captain making a second change at this end.
The spinner gets going with a maiden to Wiaan Mulder.
Sir Alastair Cook
Ex-England captain on BBC Radio 5 Sports Extra
You know that there's going to be a twist at some point.
Timothy Abraham
BBC Sport at Lord's
Nathan Lyon is warming up. Pat Cummins knows he has do to something as South Africa look relatively comfortable at the moment.
Solid defensive work from this South African pair, fending off Josh Hazlewood and taking a single apiece to fine leg.
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The fact that Cummins consistently goes under the radar simply for bowling first change is baffling. He is, statistically, Australia's best bowler despite not bowling with the new ball.
Anon
Jim Maxwell
BBC Test Match Special commentator at Lord's
That was a great shot. It was short and punished.
South Africa are certainly going on at a nice rate.
Cracking pull shot!
A short delivery from Pat Cummins and Wiaan Mulder plays a lovely controlled shot, sending the ball away through backward square for four.
Target 282
Josh Hazlewood continues with six deliveries to Aiden Markram.
The opener finds two more with a slice through, you guessed it, point, with the fielder in the deep ensuring there's no boundary.