The Serie A champions are interested in signing Tevez on loan in January but have yet to open talks with City over the possible transfer of the 27-year-old Argentina striker.
"Tevez is a City player," vice-president Adriano Galliani said to Gazzetta dello Sport. "The English club has authorised us to speak to his agent but we haven't spoken directly to City yet.
"We don't know what City want.
"I prefer not to speak too much about Tevez, otherwise his price will go up and this is not good."