The Tottenham striker is up against former teammates at White Hart Lane but says he is not going into the game feeling like he has anything to prove.
"It's going to be important for me to prove how good I am but I don't have any pressure that says I have to beat Man City because of the way they treated me, because they bought me expensively and sold me for cheap," said the former Arsenal ace.
"That has nothing to do with football.
"I just have to go out there and play my football and find a way to help Tottenham win the game because now I play for Tottenham.
"Man City is a sacred club. I have a huge respect for the players because I got players there that I can call family. Yaya Toure, Kolo Toure and Vincent Kompany are very good friends so for me I get to play against my old team.
"Things happened in Man City. For me, I move on and [Roberto Mancini] has moved on. I wish him the best of luck. For me now Mancini is just a manager I respect, just like Arsene Wenger, like Harry Redknapp, and that's it."