On the field as well, he had asked the fans not to boo the ex-Australian captain.
His move was appreciated by many, including former cricketers.
It first happened during the Indian innings, when Smith was fielding at the third man near Vauxhall End.
As the crowd booed him, Kohli looked up at the stand and asked the fans to cut it and cheer him.
Also, during Australia's chase, the section of the crowd booed Smith when he walked out to bat, with Kohli urging them to clap for him.
Following the incident and the match, Kohli said that he didn't want the Indian crowd to set a bad example.
Kohli stated that he felt that Smith didn't do anything to be booed, as he was just playing the game of cricket for his country.
Kohli also said that he apologized to Smith on behalf of the Indian fans.
“If I was in a position where something had happened with me, and I’d apologised and accepted it, and came back and still I would get booed, I wouldn’t like it either.”#ViratKohli on why he asked the fans to stop booing Steve Smith. #CWC19 | #INDvAUS pic.twitter.com/CIMicjoSA0— Cricket World Cup (@cricketworldcup) June 9, 2019
Smith, along with his Australian team-mate, was at the center of controversy last year when these two were charged for plotting a ball-tampering incident in a Test against South Africa in Cape Town.
Post the incident, the two were banned for a year by Cricket Australia (CA).
Both made their return to competitive cricket in IPL 2019, but have been facing the heat since.
Kohli also said that what happened to Smith was a long time back, and that the latter is back now.
He also stated that while they had issues in the past, it is not fair to see him getting treated in the way every time he walks out.
"What's happened has happened. He's back, he's worked hard and he's playing well," Kohli concluded.
India defeated Australia by 36 runs.
Winning the toss, India got off to a dream start and that helped them set the base for a big score.
Kohli joined in and played a gem of an innings as well.
In reply, Australia started off cautiously and stayed in touch.
But Jasprit Bumrah and Bhuvneshwar Kumar picked up wickets to halt their progress.
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