As the umpires were analysing the condition of the ball, Bancroft seemingly took out the yellow item from his pocket and stuffed it inside his underpants.
The disgraceful act was committed by rookie opening batsman Cameron Bancroft who was caught on television camera holding a small, yellow object working on the rough side of the ball.
He said, "The leadership group knew about it".
"I'm not proud of what's happened. It's not in the spirit of the game", said the skipper. "[It is a] deeply regrettable action".
There were boos from a capacity crowd at Newlands when the incident was shown on the big screen.
"I saw an opportunity to potentially use some tape, get some granules from the tough patches on the wicket and tried to change the ball condition", a visibly distressed Bancroft told reporters afterwards.
'I was cited on the screen and that resulted in me shoving it down my pants'. Soon Handscomb is on the field and has a chat with Bancroft.
None as jaw-dropping as this, though. "Doesn't look good", Smith said as quoted by Sport24. He didn't say if he admitted to the charge. They can be charged under the International Cricket Council code of conduct and bans could be handed out. Smith, who held a world record-equalling five catches in the first innings, had already added to his tally by catching first innings century-maker Dean Elgar off Pat Cummins for 14.More news: Marvel-themed lands coming to three Disney parks in 2020
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However pundits who thoroughly analysed the footage believe the object may have been sandpaper, which Bancroft then quickly hid in his trousers when apprehended.
Bancroft said he was "in the wrong place at the wrong time" when he got involved. "I was nervous about it". The leadership group's integrity has come into question and rightly so.
"It was purely the players, and the leadership group (that were responsible)", Smith said. I imagine if that option was available in cricket, CA would be writing a cheque right now.
As the ball-tampering issue rocked Australian team, the cricketing fraternity appeared divided.
Faf du Plessis was found guilty of ball-tampering during a 2016 series between the two sides, when he applied saliva to the ball with a sweet in his mouth.
Twitter though was miffed over Australia's poor tactics which marred such a wonderful Test match and bashed over their actions. "It won't happen again under my leadership I can promise you that". I don't think he would have made that decision by himself. "This is something I am not proud of, something I can learn from and like I said, I am embarrassed to be sitting here talking about this", he said.
"I'm incredibly sorry for trying to bring the game into disrepute the way we did today".