Not to say Barcelona have no chance. I know Barcelona's overall performance is not very good. Their performance is erratic. However, this team cannot be underestimated. They have several experienced players in their squad.
In the Champions League we have seen in the past that the favorite teams do not always win. A few years ago we saw a mediocre team like Chelsea win the Champions League title. Almost every team that qualified for the Round of 16 performed well in the group stage. So I would say there is absolutely no chance of underestimating the Barcelona team. I think Barcelona will win against Napoli.
Barcelona's condition, which is not at its best, raises a little doubt that this team can survive longer in the Champions League. Barcelona may be able to beat Napoli who are slumping in Serie A, but will struggle when facing tougher opponents in the next round. I believe anything can happen in football, if you look at the performance of other teams such as Real Madrid, Bayern Munich and Manchester City it will be difficult for Barcelona to get rid of these teams.
If only comparing Barcelona with Napoli, it is clear that Barcelona will still have a good chance of winning by beating Napoli . Because indeed,at least Barcelona still has a good situation and conditions compared to Napoli this moment and therefore, I personally believe that Barcelona will still be able to qualify for the quarter finals .But unfortunately, if I consider thequality of Barcelona at least in a few seasons and not just about this season then ya, at least Barcelona is still not strong enough to be able to go further . Therefore,I think meeting or playing against Napoli in the round of 16 is lucky for Barcelona because and that way, ofcourse Barcelona has a chance to qualify for the quarter finals.