The 24-year-old Argentina international scored 12 goals in 30 league appearances last season, and netted the winning goal against Queens Park Rangers that secured them the 2011/12 title.
"I'm very happy at City and I feel very appreciated," he told the club's website recently.
"It's been barely two years since I've arrived and sometimes I feel like I've been here for all my life."
LATEST ARTICLES
