South Africa were 160 for six in their second innings at tea, an overall lead of 193.

Opening bowler Clark took four for 49 and leg-spinner Warne two for 40.

In a match in which bowlers have always had some help from the pitch, South Africa seemed to be forging a strong position when they reached 100 for two soon after lunch.

Warne made the breakthrough when Herschelle Gibbs went down the wicket to him and was caught at mid-on for 53.

Then Warne had first innings top scorer Ashwell Prince caught at leg slip for nine, before Clark dismissed South African captain Jacques Kallis for 27 and Jacques Rudolph for nought.

Australian tail-ender Brett Lee earlier scored 22 of the 24 runs added by Australia before he was last man out for a career-best 64. Australia were all out for 270, 33 behind South Africa's first innings total.

Lee was caught at deep mid-off from the bowling of fast bowler Makhaya Ntini, who finished with six for 100.

He was involved in a controversial incident off the eighth ball of the day. With his score on 45 he edged Shaun Pollock to first slip, where Boeta Dippenaar held what television replays indicated was a legitimate catch. Lee stood his ground and was given not out after umpire Tony Hill consulted with square leg umpire Steve Bucknor.

The decision unleashed boos from the crowd following an incident Friday when Bucknor confirmed from square leg that Australia's Matthew Hayden had held a slip catch to dismiss Jacques Rudolph, even though television replays were inconclusive.

South Africa quickly lost AB de Villiers, who padded up to a ball from Clark which cut back and hit his off stump, while Boeta Dippenaar was superbly caught by Matthew Hayden at gully off Clark.

Australian opening batsman Justin Langer, who retired hurt after being hit on the head by a ball from Makhaya Ntini Saturday, stayed at the team hotel Sunday recovering from concussion.