Childish' Smith in the spotlight after India survive for Sydney draw
Smith was at his best with the bat in the match, making scores of 131 and 81 as he returned to form in style after a recent lean spell.
However, it may well be his footwork during Monday's final day will overshadow what he achieved during the rest of the Test.
With India battling to save the game, stump camera footage seen on social media showed Smith standing at the crease during a break in proceedings, the Australian shaping up as if he was batting, including marking a guard.
His actions at the crease forced India's Rishabh Pant to retake his own guard before play resumed, with the moment becoming a hot topic on Twitter.
"Tried all tricks including Steve Smith trying to remove Pant's batting guard marks from the crease," former India batsman Virender Sehwag wrote to accompany the footage that was seen on the international feed of the broadcast.
Retweeting Sehwag's post, ex-England captain Michael Vaughan added: "This is very very poor from Steve Smith!!". Meanwhile, David Lloyd, who played and coached England before becoming a television commentator, wrote: "How childish".
Pant did not seem too perturbed by what happened, however, going on to make 97 as India impressively secured a draw.
Smith was sacked as Australia captain following the ball-tampering scandal during the tour of South Africa in 2018. Along with team-mate David Warner, he was banned for 12 months from international and domestic cricket for his involvement in the incident.
Cameron Bancroft, who was the player caught by television cameras appearing to use sandpaper to alter the condition of the ball during the third Test against the Proteas at Newlands, was handed a nine-month suspension.
Tim Paine, who took over as skipper of the Test side, was also trending on social media after a verbal exchange with India's Ravichandran Ashwin during the final session of play at the SCG.
Ashwin pulled away before a delivery as he and Paine shared words, their conversation picked up by the stump microphone.
England paceman Stuart Broad pointed out on Twitter that such situations are "part of the game" during a Test match, though did suggest Paine's use of an expletive could land him in trouble.
The wicketkeeper was indeed fined after the game, though lost 15 per cent of his match fee as punishment for dissent after questioning an umpiring decision during day three of the match.
Ashwin ended up unbeaten on 39 to help India survive and remain level at 1-1 in the series ahead of the final game in Brisbane.