Barcelona has a higher chance of winning the match, even though several key players are injured. The second leg will be held at Barcelona headquarters, which will certainly benefit Xavi squad. Napoli experienced more ups and downs in performance than Barcelona, their position in the Serie A standings is a reference that they are very inconsistent, and failed to finish in the top four of the standings. Barcelona is still in the top four in La Liga, and has a big chance of appearing in the Champions League next season. Barcelona winning percentage was quite high in the second leg, Xavi had to formulate a strategy so that his team could win easily.
I can say Barcelona have good odds than Napoli because both team have proven to be stronger and watching them play in their perspective league this weekend was totally dissapointing, Napoli held a draw while Barcelona struggled to score a goal making it 1 nil victory against their opponent. These are elite team and they're not obligated to be facing challenges this season. Thinking about or it more coincidence, Barcelona and Napoli lifted the league title last season but this current one comes with a whole lot surprises on both ends.