Tonight would be harder than the other nights,but if Barca would play in his higher level, everything is possible. Key of the match I think would be middelfild, because should make balance between defence and attack also they should make pressure and cut their actions immediately to make decent position for scoring.
On the other hand, attack should make their duty, I am concerning about Pedro, but he deserves to play tonight for that what he did in the past for club (player for remarkable games). In addition support should com from defence specially from wingers Alves on the right and the best options for tonight on the left side Methiu.
I believe.