Barcelona midfielder Andres Iniesta has warned his teammates against complacency ahead of their crucial Champions League last-16 clash with Manchester City.

The Catalan giants welcome City to the Camp Nou tomorrow night having earned a 2-1 first-leg win in Manchester three weeks ago.

While Barca are the favourites to go through to the quarter-finals, Iniesta believes that the tie is far from over.

"They are very dangerous, especially up front," he told reporters. "At every level of the game we need to be 100% focused. We can't afford to think 2-1 guarantees qualification. It's difficult to forecast what will happen as one play can change everything."

Barcelona currently sit at the top of the La Liga table, one point ahead of rivals Real Madrid.