Rabada was banned for one Test during a series in England previous year after accumulating a total of four demerit points when he was penalised with one point after a send-off of Ben Stokes.
Kagiso Rabada celebrates Steve Smith's wicket.
Nearly inevitably, Australia struck right back with four quick wickets after tea as the visitors threatened to run right through South Africa's lower order much like in Durban.
The Australian seamers made effective use of reverse swing for most of the second and third sessions to pose some hard questions for the batsmen before Steve Smith took the second new ball just over five overs from the close.More news: SPDR S&P 500 ETF (SPY) Rises 1.281% for Mar 9
The first session of Day 1 produced 98 runs and one Australian wicket off its last ball and South Africa carried that momentum forward.
Repeat offender Kagiso Rabada could miss the rest of the four-test cricket series between Australia and South Africa, having brushed Steve Smith's shoulder during a screaming send-off in Port Elizabeth. The hearing will be conducted by the match-referee Jeff Crowe who was also at the helm during David Warner and Quinton de Kock spat. Although the incident did not appear to be particularly serious, Rabada's fellow fast bowler Vernon Philander effectively confirmed there was some concern among the South Africans.
He had Smith and Shaun Marsh out lbw, with both failing with reviews, and Mitchell Marsh was caught behind by de Kock attempting an expansive drive at an inopportune moment just before tea. He was bowled by Pat Cummins for 29.
Continuing an encouraging series, Marsh - shrugging off an illness hindering him on day one - bowled beautifully and menaced with the ball reversing. Australian opening batsmen Cameron Bancroft and Warner survived a testing first hour, scoring only 23 runs in 14 overs, then seemed to have taken control as they added 75 runs in the next hour, only for Bancroft to be out for 38 off the last ball before lunch. He scored his runs off 100 balls with nine fours.More news: Sanctions on North Korea Will Continue Until a Deal Is Reached
The on-field umpires Chris Gaffaney and Kumar Dharmasena charged Rabada with making physical contact with Smith, but South Africa have indicated they will contest the charge on the basis that contact was accidental.
A level-two charge results in at least three demerit points.
Australia was undoubtedly aided by Elgar and Amla in believing that defence was the best method on a tricky pitch but the attack received just rewards for a disciplined bowling effort when wickets were not forthcoming.
"We didn't let them get away (in the second session), they must have gone at one or two an over", Marsh said.More news: Elgar, Amla hit 50s, South Africa makes progress in 2nd test
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