Tevez arrived earlier this year from Manchester City.
"When we signed him we knew that we were getting a certainty," Nedved told Tuttosport on Friday.
"Carlitos is a phenomenon. We never had any doubts about that and the results are confirming as much.
"Tevez is a leader, there are traits of myself and Antonio Conte in him," Nedved added. "He certainly could have played in our Juve.
"Carlos is a champion. He is irresistible when he starts chasing after the ball - he just never gives up!"
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