The fight for the top four position has become very tight because some teams have improved after the sack of coaches. Roma and Napoli fall in this category, since after the sack of Jose Mourinho and Walter Mazzarri. Francesco Calzona and Daniele De Rossi are gradually changing the fortunes of these teams. I just hope they maintain this good performance.
For Roma I think they can do it but for Napoli they won't be able to do it until the end of the season. Napoli still have to improve their overall performance and even though they have just won against Juventus, this cannot be a strong guarantee for them to continue to progress with consistent wins.