Ex-Test bowler Paul Harris says David Warner is a "bully" who keeps quiet when the chips are down.
The Australian spinner then grazed past a sprawled-out de Villiers after whipping off the bails at the non-striker's end and dropped the ball right in front of him, as he raced to join Warner and the rest of the players in wild celebrations, according to Sydney Morning Herald.
De Kock was struggling for form during the recently concluded Test series against the Indians where he could manage only 71 runs in 6 innings. Get a free 2-week Foxtel Now trial & start watching in minutes.
The incident is in the hands of match referee Jeff Crowe, with no immediate clarity about when a decision could be expected.
Australia should wrap the Test up when play resumes this evening, they need just one wicket with South Africa still 124 runs behind.
The CCTV video shows a fired-up Warner remonstrating with de Kock as the teams walked upstairs to the change rooms during Sunday's tea break.
The Australian athlete was restrained from moving towards the Proteas' wicketkeeper-batsman by Usman Khawaja, and later Tim Paine before he was pushed away by captain Steve Smith.
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The Proteas claim Warner was also directing personal verbals at de Kock, although that has been sternly disputed by Smith. "He can be a bit of fool at times".
That was the tweet from the elder sister of Quinton de Kock, possibly summarising many South African fans ire against Australian opener David Warner who was caught in ugly tirade against South African keeper during an edgy first Test between the two teams.
In the past, South Africa's players have made the mistake of complaining about Australia's sledging to the media, starting with Graeme Smith's revealing interview to Sports Illustrated in 2002, through to du Plessis describing them like a "pack of dogs" in 2014 and Dale Steyn's public refusal to forgive Michael Clarke for personal comments made on the field during that same tour.
Footage published by South African organisation, Independent Media, initially shows curious Australian players coming up the stairs but looking down at the commotion under them. "I can tell you that David Warner is very personal". "CA is aware of reports of an incident between players in Durban", a CA spokesperson said.
"You don't say anything about someone's family", he said. That's pretty much all the characteristics of a bully. They're just like, well he's quite personal so we're going to come back at him and see how he takes it.
"If they were not there and he goes on the path that he was intending, who knows what would have happened".
Since it was a commonly held opinion that Warner had mellowed down after being handed the responsibility of vice-captain and his seniority in the team had influenced him to confine his aggression to the field only, Gilchrist mentions that his teammates are aware the "old Warner" is back.