The Argentine has put last season's differences with his manager behind him to score three goals in six Premier League appearances so far this campaign.
"Carlos [Tevez] is a top striker, one of the best in the Premier League," said Mancini. "My relationship with Carlos is good. I am happy with the way we handled [Munich].
"When we started the season this year he was serious and working well for the first time after four or five years.
"I was happy with his work in pre-season. He played in the first three or four games I am happy with him. These days we don't talk about what happened in Munich. We have talked enough."
Tevez joined City from Manchester United in the summer of 2009 and helped the Citizens win the Premier League last season.