The tweet, which was quickly deleted, suggested that Smith was "just as guilty" for the shoulder contact as Rabada, and accused the Australian captain of "trying football skills to get a penalty".
Not slowing down: Dean Elgar says the Test series will continue to be heated.
"But there are rules that are implemented for certain instances in the game, and we as cricketers respect that". Mpofu's first task will be to try to convince the judicial commissioner to put Rabada's two-Test suspension on hold to enable him to play the Newlands Test, which starts on March 22.
"Having him in the side is massive for us".
Hopeful that the ban will be overturned, South Africa have named Rabada in the squad.
"He had the opportunity to avoid the contact and I could not see any evidence to support the argument that the contact was accidental", Crowe said in a statement after the second test. "We as players are trying to isolate ourselves away from that situation", Elgar said.
Elgar said he did not expect Philander to be too concerned about anything the Australians might say.
"I take responsibility for what happened". The intensity should be there. that's what makes this format still exciting in my eyes. "He's quite a relaxed human being, but on the field he's as competitive as anyone else". I don't know if it's these wickets but nicks tend to balloon a bit more, whereas in Australia sometimes they actually go finer.
The case is being heard, via video, by Michael Heron, the queen's counsel and former New Zealand solicitor-general.
Rabada was charged with a Level 2 breach of the International Cricket Council's code of conduct for the Smith incident.
With Kagiso Rabada banned for two tests, and David Warner, Nathan Lyon and Quinton de Kock all officially sanctioned, hopefully we can now focus on the game.
Australia opener Cameron Bancroft said the tweet will increase the sledging on the field but Elgar says Philander will "take it in his stride".
The 41-year-old Lee, a fearsome fast bowler during a sparkling career for Australia from 1999 to 2012, told AFP that controlled aggression is good for the sport.
"He has been at the front of a lot of attention recently, but he's got a lot of people behind him in the team that play really tough, hard cricket as well".