Speaking after day one in Port Elizabeth, team-mate Vernon Philander said it'll be a huge blow if Rabada gets suspended.
Australia otherwise battled to create opportunities to take wickets, not helped by South Africa going into their shell and playing risk-free cricket, though spinner Nathan Lyon did find good turn off the wicket and was hard to score off.
South Africa trail the tourists by 90 runs with Elgar (57 from 191 balls) and Amla (54 from 144) posting 86 runs for the third wicket, and will seek to up the tempo in the evening session on what looks a docile wicket.
Australian cricket chief James Sutherland has demanded his players show more respect for their opponents in the wake of incidents that overshadowed the first Test against South Africa in Durban.
A fiery spell of fast bowling from Kagiso Rabada has put South Africa in a strong position against Australia, after an eventful opening day of the second test. Join The Roar for live scores and a blog of the match from 7pm (AEDT). And two South African cricket officials face internal disciplinary procedures after they were photographed smiling with a group of fans who were wearing masks aimed at taunting Australia vice-captain Warner and his wife, who is with him on tour. Nightwatchman Kagiso Rabada (29) was the only batsman out in the first two sessions. Marsh trapped South Africa captain Faf du Plessis and Theunis de Bruyn lbw in successive overs.
Warner's and de Kock's confrontation wasn't the only heated moment in the opening Test, which was characterized by an aggressive fielding display by Australia and verbal exchanges between the teams that carried on off the field. Lyon removed de Kock with a wonderful, flighted delivery that turned past the bat to knock back off stump.
Rabada took five wickets in the space of 18 balls in a blistering spell just before and after tea at St. George's Park, sending the Australians slumping from 161-3. But his participation in the remainder of the series is in doubt.
South Africa was 39-1 after batting through 12 overs at the end of the day, losing first-Test century-maker Aiden Markram for 11.
A Cricket South Africa spokesperson said Rabada would defend the charge and argue that the contact with Smith was accidental.
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A Cricket South Africa spokesperson said Rabada would defend the charge and argue that the contact with Smith was accidental. South Africa's progress towards Australia's first innings total of 243 was steady right through the first two sessions.
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