not bad at all with napoli. in fact, very good. "top clubs" vs each other, all sarri years ('15-18):
yearly tables look similar: they are 3rd a few points behind roma in '15/16, tied first with roma in the second sarri year (with juve 3rd, trailing by 2 points), and tied 2nd with inda in their 91 points season.
with chelsea, it's looking bad indeed, especially the number of goals they conceded.
goals conceded on these "big occasions": 1,57/match. goals conceded vs the other teams: 0,71/match. quite a difference.