Vieira did not leave a good impression with Bianconeri supporters, as following their demotion he opted to join rivals Inter.
"I left after only a year because I didn't want to remain in Serie B. I felt bad, but this is the life of a football player.
"That season with the Bianconeri was truly wonderful. I don't think I can call this a special game for me, though, as the only one still there from my time is Alessandro Del Piero."
Vieira could well start for Manchester City in tomorrow night's Europa League meeting.
"I don't know if we have the maturity to achieve an important success, but the quality is certainly not lacking," continued the midfielder.
"It's true we don't know each other that well yet, as the team is relatively new, but we are strong and we want to win."