Barcelona will definitely beat Napoli, Walter Mazzari is not even the man for Napoli, this are just try and error coaches, for long term, you need a better and tactical genius for that club.
the situation might be different when Napoli's performance is like last season, with the same players and coach. but the situation is different, Xavi and the Barcelona squad will be more favored to win in advancing to the next round.
Barcelona will be the team that is more appreciated in this match. As the top team in the group, they will expect to meet a light opponent in the 1/8 round to facilitate their advance into this year's Champions League. However, Barcelona has been in decline this season. And when Robert Lewandowski was tormented by injuries and his age, Barcelona gradually became a mediocre team. Therefore, it is not certain that Barcelona will win this match because, after all, Napoli was the defending champion of SERIE A last season.
When it comes to performance decline, then at least Barcelona and Napoli are both experiencing a decline in performance at this moment . But indeed, although Barcelona and Napoli are both experiencing a decline in performance, at least Barcelona still has better quality. Also, when comparing the quality of the coach, at least Xavi is also still a better coach compared to Mazzarri and therefore,basically Barcelona still has a chance to qualify for the quarter-finals by beating Napoli in this round of 16.
Well, hopefully Lewandowski performance will also improve for the match against Napoli later because after all, atleast Lewandowski is also still a Barcelona goal machine. But ya, the point is Napoli made the wrong decision I guees because ya, Napoli chose the wrong coach to lead in an era like this and it was a mistake.