I agree with you that Barcelona will win against Napoli in the second leg of the UEFA Champions League Round of 16 matches. Napoli's performance against Barcelona was poor. Napoli just managed to have one shot on target against Barcelona, which led to a goal that earned them a draw. With Napoli's present form, it will be hard for them to beat Barcelona at Camp Nou.
If you look at the game in the first leg, Barcelona's game was more dominant than Napoli even though both teams were in poor condition, but Barcelona's game was better in the first leg, only Barcelona's defense was weak so they were unable to maintain their lead. even though Napoli only got one shot on target in this match.
Of course, this draw is very detrimental for Napoli and a very profitable result for Barcelona because in the second leg they will play at home and only need to win 1-0 to qualify for the quarter-finals. I think Xavi will give his best for Barcelona at Camp Nou, especially as Napoli with its new coach definitely won't find it easy to apply new strategies to their players because usually every new coach needs to adapt in order to create chemistry between the players.