Travis Head stands between South Africa and success after the home side forced the Australians to follow on.
Australia were rolled for 99 in their first innings but have made a better fist of things to keep the game alive in the second.
However, the Proteas are well on top with one day to play.
Recap the action with our blog.
Goodnight!
That’s all for today.
We will be back from 3.30pm AWST on Thursday for the conclusion to this Test.
KEEP, BENCH, CUT
A horrific first innings has put some Test careers on the line for the Australians as they stare down the barrel of a huge defeat in the second Test against South Africa.
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Stumps
Boland gets through the final over and the Australians have a very slim hope of getting some form of result from this match.
Head ends the day on 87 but his side trail by 170 after being asked to follow on.
The good news is Steve Smith is yet to bat, but he has a neck concern, while Alex Carey is also still waiting in the wings after his two-ball duck earlier in the day.
It was a dream day for the Proteas though, who should go on to level the series 1-1 heading to good ‘ole Cape Town.
AUS 4-156
Last over
Head plays out a maiden and now Boland will take the last over of the day against Harmer as the umpires say the light is okay.
AUS 4-156
Final rights?
The light meter is out but Harmer will get another over.
Australia trail by 170.
AUS 4-156
Spin only
The umpires have declared the light is too poor for the quicks to be bowling.
So Markram comes back on alongside Harmer.
AUS 4-152
Nightwatch
Boland comes to the crease again to try and get Australia to stumps.
Things are desperate.
Plumb!
Webster missed the length and gets his pads smashed into dead in front of the stumps.
He goes for eight from 33 and that is a blow for the team and his career.
The ball only turned a touch he just played it poorly.
AUS 4-150
Getting dark
The lights have come on and the light is beginning to decline.
A good time for Australia to go past 150.
AUS 3-150 - trail by 176
Thick edge!
Head gets away with a flashy drive!
He’s wanted to have a crack at Mulder and goes at the wide one with his hands.
His outside edge flies through a vacant third slip.
AUS 3-144
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