"He fits perfectly into the ideal XI for us. He is someone that has given us breakthroughs when wanted in the series and he has bowled his heart out," Kohli said.
"He really wanted Test cricket badly and has shown what a high-class bowler he is. He probably bowled with the experience of a guy who has played 40-50 games."
The India skipper further added: "If you see his pitch map, only three balls today were full-length deliveries, everything was length and back of length, and he really made life difficult for the South African batsmen.
Mohammed Shami picked his career-best haul to bowl India to a win even as all four full-time pacers shared 20 wickets in this Test.
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In fact, India were able to claim all 60 wickets in the Test series, a feat never before achieved in three-Test series on foreign soil.
Praising the bowlers, Kohli said: "The bowlers were outstanding. I mean to take all the 60 wickets in the series, we haven't done it ever before away from home. And this is the biggest positive that has come out of this series.
"The bowlers had to work really hard today. They didn't get much help from the wicket today. But the character that we showed, it will give us the belief that we can do it again and keep it doing it.
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