Ogbonna has joined the Old Lady on a five-year contract after a â‚¬13m fee was agreed between the two Turin sides.
â€śI always look to the present and future,â€ť he said.
â€śI donâ€™t consider myself as a traitor because I have always underlined that we players are professionals. My heart belongs to football and football is played in all parts of the world.
â€śI think every player has ambitions of playing at the highest levels. My choice is not because I wanted to betray anybody, it was made because Iâ€™m ambitious.
â€śThe derby? It will be important, but I have never pulled out of a challenge. Behind my passion is the desire to cause all opponents problems.â€ť