The Swedish star joined Barcelona from Inter this summer.
“I will do everything to score against Inter, because now I play for Barcelona,” Ibrahimovic told Il Corriere dello Sport.
“I will go to San Siro to do my best, and I hope we win. People know my qualities and for me it is an obligation to win every game.
“It’s normal to have to adapt [to a new club] and it’s something that will come with time. For me, it’s important to play and rediscover my rhythm. When I play more games, then you will see the real Zlatan.”