Napoli has performed poorly in the last 5 matches. I think everyone agrees that Napoli had no chance of winning that game. Lazio are doing very well in the league and they have won their last four games in the league. They are in a positive trend and they also appeared as hosts in that match. I don't see any chance of Napoli winning that game unless a miracle somehow happens.
The opportunity to win will always be there, if you look at the past, maybe Napoli is not too focused on the local league, maybe they are focused on the Italian super cup which Napoli is after, but the Italian super cup has now been won by Inter Milan.
Maybe now Napoli has to improve a little to improve its standings this week. Before the Champions League match starts. Of course, Lazio will not waste this opportunity because they are playing in front of their own supporters. If I see that both teams have quite good abilities in various lines, maybe I predict the match will end in a draw.