Firdose Moonda is ESPNcricinfo's South Africa correspondent
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It was in the 21st over of the final innings of the match, with South Africa on 60 for 1 chasing 212 to win the series, when R Ashwin hit Elgar on the pads. South Africa's captain was given out lbw by Marais Erasmus, the on-field umpire, but the decision was overturned on review with ball-tracking showing the ball going over the stumps.
The ball-tracking technology is authorised by HawkEye, an independent body, which relays the data to the host broadcaster, in this case SuperSport.
A visibly irritated Kohli walked up to the stumps, and spoke into the mic, saying, "Focus on your team while they shine the ball. Not just the opposition. Trying to catch people all the time."
Kohli wasn't alone. KL Rahul, the vice-captain, was heard immediately afterwards, saying, "It's the whole country against 11 guys." And Ashwin seemed to be addressing the broadcasters directly when he said, "You should find better ways to win, SuperSport."
The Indian players were not the only ones who didn't agree with the decision. Erasmus could be seen shaking his head as the pictures played out on the screen at the venue, and was heard saying, "That's impossible".
After the day's play, when Lungi Ngidi was asked if he trusted DRS to do its job as expected, he said, simply, "Yes". When asked why, he elaborated: "We've seen it on numerous occasions being used all around the world. It's the system in place. That's what we use as cricketers."
But the Indians were not on the same page.
When asked if the Indian players were suggesting the broadcasters were manipulating the images, Mhambrey said, "Every individual out here is trying his best. Sometimes in a moment like this, people do say certain things. It's a game. I think it's fair we just move on. Everyone is trying their best. Emotions do come into play sometimes."
Ngidi further said, "Reactions like that show a bit of frustration and sometimes teams capitalise on that. You never want to show so much emotion, but we could see emotions were high. That tells us they are feeling a little bit of pressure.
"That was a good partnership [between Elgar and Keegan Petersen for the second wicket] for us and they really wanted to break it. Those feelings ended up showing there. Everyone reacts differently and what we saw there was what those guys were feeling at the time."
Elgar was eventually dismissed on the stroke of stumps, and DRS was in the picture again. This time, it was after India reviewed a not-out decision from the other umpire, Adrian Holstock, for a catch to the wicketkeeper off Jasprit Bumrah. It was a full delivery going down leg, and Elgar looked to flick but only managed to nick it, and Rishabh Pant took a diving catch to his right.
India reviewed, and Kohli was heard saying, "Wonder how they're going to show that." As it transpired, UltraEdge showed a spike as ball passed bat and Elgar was given out.
There was a similar incident recently, in the Mumbai Test between India and New Zealand, when Cheteshwar Pujara was hit below knee by Ajaz Patel and was given out. Pujara suggested he had hit the ball, which was not the case according to the replays, but the ball was shown going over the stumps.