He was fined 50 percent of his match fee and given three demerit points, which took him past the tally of eight that triggers an automatic suspension. "He had the opportunity to avoid the contact, and I could not see any evidence to support the argument that the contact was accidental", he said. "Those are the kinds of things that I would say is aggression".
If that challenge fails, Morne Morkel is set to be recalled for the third Test that starts next Thursday because Dale Steyn remains short of match fitness.
Starc and Rabada's contest within a contest and their devastating reverse-swing spells have been highlights of the first two tests.
Anderson confessed that in that moment directly after taking a wicket, especially in a big series, it is hard to control your emotions. It's really competitive out there so your emotions do take over at sometimes. But they are the judge, they make the final call, and who are we to say where the line is?
While Rabada took a magnificent 11 wickets in the second Test against Australia, Ngidi proved an admirable foil for him, claiming important wickets in the first innings when he bowled both David Warner and Tim Paine, and then tying up an end in the second innings as he conceded just 24 runs in 13 overs, as well as taking two more wickets. "But when I came into worldwide cricket and saw the things that go on, I was taken aback", Ngidi said.
"I have to see it as a big learning curve and not repeat the same mistake".
That doesn't mean Ngidi, who made his Test debut in January, won't try to get in the mind of batsmen.
Meanwhile, the ICC confirmed that Rabada has indeed appealed his Level Two charge, which led to him being suspended for two Tests.
"It was awesome to see KG bowl like he did and just to be out there when such great cricket was being played, it's good to see".
"Obviously these days the attention has focused on what is allowed, what is not allowed, I just think that has changed so much over a year or two", Du Plessis said at the post-match press conference. The governing body said it will appoint a judicial commissioner in "due course".