Totally depends on what strategy is gonna be used by napoli in this match. Calzona shall use his creativity to ensure that his club will be able to win against barcelona soon. Playing offensive against barcelona has same meant like club to do suicide. Barcelona will be fully offensive in this game no matter how complete the line up of napoli.
Surely Barca will choose an attacking style of play because this is their strength, instead of counter-attacking defense which is not their forte. Imposing a style of play will be Barca's target when they play at home. However, Napoli is not a team that plays defense quite well in recent times, so they may still play a double attack with Barca, although this may be a disadvantage for them.
However, I still believe that the home field factor will help Barca win this match. They are winning at home in their last 3 matches in the Champion League arena. This can be an important factor to help them confidently aim to win against Napoli.
In terms of force, Barca is missing many players due to injuries such as Pedri, Gavi, De Jong, Alejandro Balde, Marcos Alonso and Ferran Torres. Meanwhile, Napoli will be without the services of Jens Cajuste and Cyril Ngonge.