The Argentina striker is reportedly on the verge of a move to the Serie A champions.
Tevez played under Mancini at City for four years and the former Inter Milan coach believes that the player will achieve great things at Juve.
"He is an extraordinary player, capable, with great technique and talent," Mancini told TuttoJuve.com.
"He will certainly do well at Juventus. I can't wait to see him in action in Italy."
The striker will reportedly fly to Italy to undergo a medical today with a fee of around £10m said to have been agreed.