Buffon's representative Silvano Martina insists there has been no contact between City and Juventus.
"A deal doesn't exist between Manchester City and Buffon, there is nothing at all," Martina told Goal.com.
"The paper who wrote the story are dishonest, liars and they only hurt themselves.
"Manchester City have never contacted the player. Whatever has been written this morning is worse than rubbish.
"It's a disgrace and they should be ashamed of themselves. I have never spoken to anyone and Juventus have never received an offer.
"Buffon is happy at Juventus and he has a contract there.
"Even in Italy there have been plenty of reports but what can you do? Unfortunately we live in a world where this is no respect and no rules.
"The figures being written are absurd. Stupid people just write what they want, does that mean it's news?
"It's absurd to suggest these things and write. Even Manchester City had released a statement stating they haven't contacted anyone."