Manchester City travel to the Camp Nou tonight planning to overturn a 2-0 deficit suffered from their first-leg defeat against Barcelona three weeks ago.
The Citizens have not been on top form recently.
Losing to Wigan in the FA Cup on Sunday was a huge shock and now Manuel Pellegrini's side are nine points behind Chelsea in the Premier League.
Sergio Aguero missed the first leg and will be a definite starter but which other areas can City hurt the Catalan giants?
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