Roberto Mancini's summer shopping for more quality recruits could step up the pressure for a player who started only five Premier League games, scoring three goals.
He told City's website: "They could get important players, so we'll see what I should do. It's been frustrating not to have been as fit as I would have liked in my first season.
"I couldn't play as many games as I wanted, and you have so few opportunities to score, which is what strikers are paid to do.
"When you've not been fit, sometimes you want to do too much and you push yourself too far. That happened a few times. But every time I play now I feel good, and that I can do well."