Tevez arrived in Turin from Manchester City in the summer of 2013, with the Bianconeri paying €14 million for the forward's services.
The deal was considered a gamble by some pundits, due to his tumultuous time at the Etihad Stadium.
However, he has been a huge success in Italy, firing Juve to back-to-back Serie A titles and the final of this season's Champions League.
"Carlos is a player we didn't know and I didn't really know before," Buffon is quoted as saying by Uefa.
"But these last two years he has really been an unbelievable surprise because he integrated into the team right away and adapted immediately to our way of working and training.
"It is certainly different to English football and also different to the Argentine mentality.
"It was something he had to deal with, but he immediately began working hard to try to understand what was being demanded of him.
"Now he knows perfectly what he has to do to help the team and to help his team-mates.
"He understands at every moment of a match when he has to help out, when he has to make an extra run, when he perhaps needs to commit a foul, or when he has to keep the ball.
"He is a really hard worker and just a great man. I am very happy to play alongside him and to have met him."
Tevez, whose fine form this season secured him an international recall after three years in international exile, has scored 39 goals in 66 Serie A appearances for Juve.