However, this week at a training session in Paris, Erasmus was filmed showing Esterhuizen how he should do the Farrell tackle.
Gardner deemed it a legitimate tackle as he felt Farrell had made enough of an attempt to wrap his arms in the tackle.
Springboks coach Rassie Erasmus has made a pointed jibe at the decision surrounding Owen Farrell's controversial tackle last weekend at Twickenham. "There was nothing wrong with the tackle so we can also start doing that".
"Angus Gardner is a world-class referee, who is rated by World Rugby".More news: At least 15 killed in China highway crash
"We will not be commenting on the video", Rumbles told Sport24 by email.
Australian referee Angus Gardner came under heavy criticism after he didn't award South Africa a penalty for what looked like a risky and no arms tackle by Farrell on Esterhuizen in the 84th minute of the match.
South Africa head coach Rassie Erasmus was asked about the tackle after the game and gave a brilliant sarcastic response, saying the tackle was very "effective" and that "we should do it". Tackle a guy like Andre and stop him in his tracks is some going.
"It was not worthy of a red card and it was right that World Rugby did not cite the player, but there's not much doubt that it should have been a penalty", Watson said.