Napoli couldn't secure a winning score against Blaugrana in the first leg and its pure motivation for Barcelona to fight back in the second leg. Barcelona will hosts Napoli in the second leg of round of 16, an important game that deserves the big winning from the exact club that clinched on winning form. Nobody gets a clear view except for clubs that have fought really hard to enter significant phase in the UEFA Champions League. Xavi Hernandez will ensure everything works smoothly as plan for his side because he already missed out on the La Liga title race but the UEFA Champions League will be intact for them this season.
Totally depends on what strategy is gonna be used by napoli in this match. Calzona shall use his creativity to ensure that his club will be able to win against barcelona soon. Playing offensive against barcelona has same meant like club to do suicide. Barcelona will be fully offensive in this game no matter how complete the line up of napoli.
Blaugrana must able to get a ticket to go to the next stage. The situation may be getting even more difficult since napoli was not getting good warm up in the previous game. Napoli needs to get the main weakness of barcelona to win the match
Napoli could not take advantage of their home advantage in the first leg match against Barcelona because it only ended in a 1 - 1 draw and in the second leg match Barcelona will have the advantage over their home match, this will be a tough match for Napoli.
I'm not sure Calzona can bring Napoli to victory in the second leg, even though he is a great coach and has a pretty good strategy in building a team, he will have difficulty bringing Napoli forward in the next round.
Barcelona will win the match, even though they are in conditions that can be said to be unstable, but they clearly have all the support to win over Napoli.
Moreover, currently Napoli are also not showing good consistency in every match, even though after changing coaches they have been able to get several wins in Serie A, but this is a UCL competition and they are eliminating each other in order to continue to survive.
We'll see what Calzona will do, whether he is able to bring Napoli to victory in the away match against Barcelona or instead suffer defeat and be eliminated from the UCL competition.