Have your say on South Africa v Australia

Marco Jansen sneaks a quick single off the final ball of that Josh Hazlewood over, which goes for nine.

This is proving to be quite the fruitful partnership.

Cooper Connolly, who picked up his first Test wicket earlier today, is back into the attack as Nathan Lyon takes a break.

The review shows the ball has hit Breetzke's front pad first!

This is turning into a collapse for the hosts who have gone from 203-1 to 216-4.

It seemed speculative at first, but a great review from Australia. Breetzke had plenty of bat on it, but the ball touched the pad first. It is a first ever Test wicket for the 23-year-old Cooper Connolly.

An excellent spell for Australia.

South Africa captain Temba Bavuma will be given a luxury when he comes into bat next at some point today.

At Gqeberha, he went out to the middle at 12-2 prior to producing his best ever Test knock of 179.

In the first Test, was in at 84-2 and 73-2, so he's going to get the best part of 100 runs on top of that as a bare minimum.

Five singles and start the over before Mitchell Starc produces a no ball.

The extra delivery is punished for four by David Bedingham, a 10-run over for the hosts.

Marques Ackerman needs just one ball in the over to get his 50.

It has been a great knock from the Test newbie, reaching his first half-century in just 62 deliveries.

He has scored north of 6,000 first-class runs at an average north of 48.5, and can add a Test 50 to his list of career achievements.

Marques Ackerman sends that into the stands!

Another skip down the track, he smashes a Nathan Lyon delivery for six. Using his feet and timing the stroke expertly.

A hammer blow to Lyon, who had kept the rate down until now.

South Africa opener Marques Ackerman is making just his second Test outing.

On debut at Gqeberha, Ackerman only got one chance to impress. He scored just six runs.

Currently at a Test-best of 16, he will hope to make better on his chance in this series-decider.

Five runs from that last over.