The 29-year-old Tevez has just more than 15 months remaining on his current deal, and it has been speculated that a summer exit could be on the cards to avoid the striker leaving for nothing at the end of next season.
Marwood believes the situation has completely changed for the better since Tevez’s self-imposed six-month strike a year ago, though, and he revealed that talks over an extension continue.
"Everyone knows Carlos only has a year left on his contract, but he has been fantastic for Manchester City, his scoring record, his tenacity, his energy," Marwood told the Daily Star. "I think he is in a good place at the moment. Roberto Mancini has talked about extending Tevez's contract and these conversations will continue in the summer."
After a move to Serie A giant AC Milan fell through during the 2012 January transfer window, the club has rebuilt its relationship with Tevez, and Marwood does not feel City is willing to entertain offers at any point in the near future.
"We have had no offers and Carlos is happy at the club. Discussions will take place at the end of the season in terms of his future at City," Marwood said.