Maybe this is a problem of poor strategy for Napoli or because Barcelona is too good at managing the tempo of the game. Barcelona performed well from the first half and so far they have made 6 shots on goal out of a total of 11 shots. They can win this match and increase their chances of qualifying for the quarter-finals, so in the end perhaps this is why Barcelona should not be underestimated.
Barcelona failed heavily to secure their first winning against Napoli that's shaky in league matches. However there's another chance for Barcelona to step up their game, if they messed up this one, it's all going to be a long boring week for the supporters. Barcelona have returned back to winning streaks and they wouldn't take it easy on their opponents when they meet. Their next game is Napoli and this is the second leg of the round of 16. Xavi Hernandez have to take it personal because it's in his last days of managing Barcelona where he's legend.
From the recent performances of Barcelona, it is possible that they will win Napoli in Camp Nou. This is because is like Barcelona have started improving in their performance and seriousness to win matches, unlike before. We have seen them win their recent games, apart from the one that they played draw with Napoli. This past weekend, they won, and this will give them confidence on facing Napoli with high morale.
Napoli is also a team that is passing through difficult times like Barcelona, but they might not be able to play the way that they played in Italy, because there is always a home advantage for every club playing at home. However, it is 50-50,and any of the club that can outsmart the other club will win the match, and qualify to the next round.