Chelsea were lacking dynamism and conviction as Huddersfield sat deep and proved hard to break down, but Pedro's driving run and pass out to Willian enabled the Brazilian to pick out Kante, who scuffed a left-footed volley into the ground and inside the far post in the 34th minute.
There will be much to work on but also plenty to please Sarri: Three goals, occasional spells of the lightning-fast passing and decision-making that he wants, plus an assured debut for new goalkeeper Kepa Arrizabalaga, who dealt with the relatively few challenges he faced with little to no fuss.
It took us a while to get going, but once we did, Huddersfield didn't stand a chance.
Before the second goal, the Terriers had hit a post through Steve Mounie's header, but it was to be Sarri's and Chelsea's day.
Maryland places head football coach DJ Durkin on leave
On Saturday afternoon, the university made a decision to go even further, placing head football coach D.J. Matt Canada will serve as interim head coach.
Chelsea defender Antonio Rudiger has no doubts over the commitment of Eden Hazard. Sarri is famed for getting the best out of his strikers, but said: "In Naples, we played at great speed, ball forward, ball back, with continuity, with great speed with the strikers". However, this was forgiven just before half-time when he made a buccaneering break into the Huddersfield box and drew a foul to secure the penalty which Jorginho converted. He took responsibility for the penalty won by Alonso and the cool, clinical manner in which he scored suggests he may get further opportunities even when regular taker Hazard is on the pitch.
Kante's goal, although not easy on the eye, swerved awkwardly toward the far corner. Apparently limitless reserves of energy meant the France worldwide was able to maintain the high-tempo press from midfield throughout the game.
Of the three in midfield, Ross Barkley on the left looked the least effective.
Chelsea started the first-half with the same languid approach that had optimised their pre-season, lacking any pace and incisiveness on the turn, instead reverting to an impassive and disjointed accumulation of short five-yard balls and careless clearances.
"And I think the good thing about it, you look at Man City and you look at Liverpool".
For the opening 30 minutes of the match, Chelsea barely troubled the Huddersfield defence and that was largely down to the impressive performance of Terence Kongolo.