The southpaw smells a rat when it comes to ball-tampering in The Ashes series.
Earlier in his Test career, he used to stand on the middle stump and there was no movement before the ball was bowled.
Root had to head back to the pavilion after being ill during the course of action on the final day.
Here are 5 major talking points from the 5th Test.
Australia beat England by an innings and 123 runs in the final Test at the SCG to cap off the series 4-0.
Pat Cummins led the way for the hosts on the final day as the game ended soon after lunch.
Pat Cummins was adjudged Man of the Match for his 8-wicket haul in the game.
Australia is 6 wickets away from completing a 4-0 win in the series.
Australia are only 6 wickets away from yet another thumping win.
England finished the day on 93/4 and still trail by 210 runs.