This match is not a problem to Napoli to win with or without Osimehn’s presence. They’ve shown that they can do without him in some matches but I believe it won’t be in all matches. A three goals difference in this match that gave them a victory was well deserved for them. Fiorentina is a smaller team compared to Napoli. In their last five encounters, Napoli have won three matches, drew one and loss one to them. This has shown a clear record that Napoli is not their match and they’ll win them again and again if they harping to meet again this season.
And talking about rankings in the league, Fiorentina is currently in 4th place in the standings and Napoli is in 8th place with a difference of only 3 points. It wasn't a big difference even though the rankings were a little far off. The next match is Fiorentina vs Inter Milan and I think it is very likely that Fiorentina will lose. Atalanta, Lazio and Bologna have a big chance of passing Fiorentina after the 21st match.