Manuel Pellegrini has failed to win a game against Barca since 2011 . Manchester City boss endured defeats in 13 of last 15 matches . City need to win at Nou Camp to reach Champions League quarter finals . READ : Man City have changed just two first-team players since 2008 . CLICK HERE for Barcelona vs Manchester City team news .
Manuel Pellegrini has failed to win a game against Barca since 2008 . Manchester City boss endured defeats in 13 of last 15 matches . City need to win at Nou Camp to reach Champions League quarter finals . READ : Man City have changed just two first-team players since 2011 . CLICK HERE for Barcelona vs Manchester City team news .