Australia vs South Africa, 1st Test, Day 4: As it happened...

David Warner's run-out was the turning point on Day 4 of the first Test between Australia and South Africa, as the hosts were struggling at 169/4 while chasing a formidable target of 538 runs.

Perth: Kagiso Rabada's three-wicket haul put South Africa in driver's seat against Australia on Day 4 of the first Test match between Australia and South Africa. David Warner and Shaun Marsh got the hosts off to a decent start with a 52-run opening stand, before Temba Bavuma's sensational fielding effort dismissed Warner.

Day 4: As it happened...

Over 55 | Score 169/4 | (Khawaja 58*, Marsh 15*)

STUMPS: South Africa continue to dominate proceedings over Australia on their home soil. The hosts trail by 370 runs with six wickets remaining.

Rabada continued his good run for the visitors as he dismissed Adam Voges on 1. He persisted with the off-stump line and Voges edged one behind the wicket. Australia are wobbling now. The onus is now on set batsman Khawaja, to hold the innings from one end and resurrect the innings for the hosts.

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Over 45 | Score 144/3 | (Khawaja 49*, Voges 0*)

Kagiso Rabada was rewarded for some disciplined bowling as he got the big wicket of skipper Steve Smith. Rabada lured him for a drive with a quick delivery and an edge was neatly taken behind the wicket by De Kock. Huge blow since Smith had his eyes set and was looking to play a big knock. Adam Voges is the new man in. Smith and Khawaja added 92 runs for the third wicket.

SPD Smith c de Kock b Rabada 34 (91b)

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Over 35 | Score 116/2 | (Khawaja 34*, Smith 25*)

Smith and Khawaja are in the process of resurrecting the innings. After tea, these two have looked more settled and have played shots with conviction. They have now added unbeaten 64 runs for the third-wicket partnership. Australia need these two to keep going as they still trail by 422 runs with eight wickets remaining.

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Over 24 | Score 84/2 | (Khawaja 16*, Smith 11*)

TEA: Clearly South Africa's session with those two wickets. Khawaja and Smith haven't looked much convincing at the crease but have managed to make sure hosts don't lose any more wickets. Smith's wicket will be the key. His team is under tremendous pressure, and he needs to play a captain's knock today. Australia trail by 455 runs with eight wickets remaining.

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Over 15 | Score 56/2 | (Khawaja 0*, Smith 4*)

Kagiso Rabada bowled a dramatic 13th over where Australia lost both their openers. After getting a boundary off the first ball, Warner worked the ball towards point off the next ball and sprinted for a risky single. Bavuma, who was the fielder, picked the ball in a flash and threw it towards the non-striker's end to hit the middle of stumps! Extraordinary piece of fielding from the youngster. It has nailed the big fish for the visitors. Rabada then dismissed Marsh off the last ball of the over, where the left-hander edged one to Faf du Plessis, who grabbed it cleanly. Huge over in the context of the game. Usman Khawaja and skipper Steve Smith are the two new batsmen at the crease now.

DA Warner run out 35 (33b)

SE Marsh c du Plessis b Rabada 15 (45b)

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Over 10 | Score 43/0 | (Warner 28*, Marsh 14*)

As expected Australia are off to a decent start. Warner, who missed out on a century by three runs in the first innings, is batting at run-a-ball. The hosts need these two to lay a solid foundation. Warner has already hit five boundaries while Marsh has hit one.

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South Africa second innings:

Over 160.1 | Score 508/7 | (Philander 63*, Maharaj 19*)

South Africa have finally declared. Steve Smith, bowling his second over, bowled Philander, who was having a go at the spinners. South Africa added quick 32 runs to their total after lunch, 24 of which were scored in four sixes against Nathan Lyon. They have set a 538-run target for the hosts.

VD Philander b Smith 73 (143b)

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Over 157 | Score 508/7 | (Philander 63*, Maharaj 19*)

Quinton de Kock was the next South African to be dismissed as he holed one towards midwicket off Mitchell Marsh's bowling. He was looking good again and his wicket ended the 116-run stand for the seventh wicket. Maharaj is the new man in and he has so far added 40 runs for the eighth wicket with Philander, who is looking extremely confident at the crease. The visitors now lead by 506 runs. With no Dale Steyn, Faf du Plessis might be wondering when to declare, but he has more than enough runs on board.

Q de Kock c Voges b MR Marsh 64 (100b)

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Over 145 | Score 465/6 | (De Kock 62*, Philander 48*)

These two have done a wonderful job by adding more than 100 runs for the seventh wicket so far now. De Kock was once again adjudged out lbw, this time off Lyon, but a review saved him again. These two have also accelerated the pace of their innings now.

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Over 135 | Score 425/6 | (De Kock 35*, Philander 39*)

De Kock and Philander continue the good work for South Africa. De Kock was given out lbw off Hazlewood's bowling but the review saved him. Philander was dropped by Hazlewood off Starc at fine leg, where the ball clipped out of his hands and landed behind the ropes. Smith would be a worried skipper as this partnership is frustrating for the hosts.

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At stumps on the third day the visitors were 390 for six in their second innings, an overall lead of 388 with four wickets in hand although the injured Dale Steyn is not expected to bat.

Vernon Philander was on 23 and a subdued Quinton de Kock was 16, the latter having been given a life on one when Adam Voges grassed a tough chance from the bowling of Mitchell Starc.

Duminy, who made 141, said he and Elgar initially set themselves to simply occupy time at the crease and added that the visitors would again look to keep Australia in the field for as long as possible on day four.

He suggested an Australian run chase would be complicated by the fact the pitch was starting to become more difficult to bat on.

"There is still a lot of work to be done in this Test match and we won't have Dale Steyn in the fourth innings," he said.

"The pitch deterioration, the cracks have definitely opened up a bit more and can play in favour.

"We have to put the ball in the right areas, but we saw in the last hour how much the ball did."

Australian captain Stephen Smith was satisfied with the application of his bowlers on day three, but conceded his side was paying for its batting frailties 24 hours earlier.