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.
There is a big possibility that Barcelona will be able to get to the next round in the match which will take place at home in two days. But I am not sure that Barcelona will survive intact in the Champions League this season because in terms of performance there is still something lacking from Barcelona even though the team is still slightly better than Napoli, who they will host in the next two days. I also believe that Napoli will not be able to do much in the second leg of the Champions League unless the team is blessed with a high level of luck in the second leg.