How many goals do Manchester City need to score against Barcelona to qualify for the quarter-final?

Manchester City face an uphill battle against Barcelona in the second leg of the Champions League Last 16 at the Nou Camp tonight.

A win by a two-goal margin will guarantee qualification for Manuel Pellegrini's side, following their 2-1 defeat in the first leg at the Etihad Stadium three weeks ago, but should they score three goals a win by one goal would suffice, such as 3-2.

A 1-0 win would not be enough because of the away goals rule, meaning Barcelona would progress to the quarter-finals on the 2-2 aggregate score.

A 2-1 win for City would bring the tie into extra-time with the possibility of penalties.

SCENARIOS IF CITY WIN

Barcelona 0 Manchester City 1 (agg 2-2)

Barcelona through on away goals

Barcelona 0 Manchester City 2 (agg 2-3)

Manchester City through to the quarter-finals

Barcelona 1 Manchester City 2 (agg 3-3)

The tie goes to extra-time

Barcelona 2 Manchester City 3 (agg 4-4)

Manchester City through on away goals