"I think the players have done everything, left everything on the grass".
Huddersfield showed their spirit by continuing to attack and striker Steve Mounie headed against the post after Mathias Jorgensen had flicked on a corner.
The two-goal deficit deflated the hosts and the Blues took complete control after the restart, further extending their lead through Pedro as Sarri recorded a convincing victory in his first league game.
Chelsea took the lead through N'Golo Kante.
Kepa, signed from Atheltic Bilbao for £72.1million on Thursday, had little to do for the opening 20 minutes as Chelsea hogged the ball, but made a hash of an early touch when he passed straight to Town midfielder Aaron Mooy.
Kante, back on duty just 27 days after starting France's win over Croatia in the World Cup final, scored the opener, thumping a volley into the ground and past goalkeeper Ben Hamer from a Willian cross.
Pedro applied the finishing touch after Hazard accelerated forward with objective before unselfishly teeing up the Spaniard, who was cool and collected before lifting the ball over the onrushing Hamer, watching it trickle into the corner.
When asked how long it could take for his players to be at their best, Sarri surprised many with his response.More news: Bitcoin Market Cap Falls by $9 Billion After SEC Postpones ETF Decision
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Chelsea will be top of the league come Saturday night but there's still one problem - Alvaro Morata.
Chelsea was the league's biggest spenders in the summer transfer window.
MF Ruben Loftus-Cheek, 6 - Replaced Barkley in the 68th minute and brought a more physical presence to Chelsea's midfield.
Before the half-time break, Jorginho added a second from the spot.
Unfortunately for Huddersfield and Kongolo, Chelsea managed to score twice before half-time which stretched the defence.
With Eden Hazard not a guaranteed starter due to his involvement late into the World Cup, many Chelsea fans were hoping Callum Hudson-Odoi would feature in some part after his impressive pre-season.
The Italian's footballing philosophy was widely praised during his time in charge of Napoli, with the so-called "Sarri-ball" system helping the club to push Juventus all the way in the Serie A title race last season.