Rabada picked up a two-match ban for his behaviour in the first two tests against the Aussies, including getting too close to the batsmen in a competitive, fiery opening to the series.

While it's currently tied at 1-1, Rabada's 11 for 150 in the second test single-handedly led the South Africans to victory. His absence will be particularly felt by the Proteas, and Starc - although humble - was dropping hints that the Aussies know that will be the case. 

"He's a fantastic bowler to watch when he's in full flight and he's going to keep taking wickets and keep celebrating," Starc told cricket.com.au

"What's he got now, four 10-fors? Dale (Steyn) has got five in a crapload more Test matches.

"I'm sure he'll learn going forward that you just can't get that close to the batter and the umps are going to be on you at all times.

"It's very much a no-no ... which I've learnt in the past."

Rabada's now claimed 135 wickets at a strike rate of 38.9, the best record of any current test bowler. South Africa have a strong squad, but it's lacking that kind of raw firepower.

Without Rabada, the Aussies become favourite to take out the series. After a 130-run win in the first test, between Smith and David Warner, Australia's bastmen should ply on runs relatively unanswered. 

Steyn, Quinton de Kock and AB de Villiers are going to have their work cut out for them in Cape Town.