And while Sarri's daring move paid off in the return of a goal apiece, his side also dominated the midfield easily. On this evidence, he will have to do so again if they are to repeat last season's heroics.
Callum Hudson-Odoi was tipped to start after a bright preseason.
Despite putting up a staunch defence in the first half, they found themselves down 2-0 heading into half time and on the losing end of a 3-0 scoreline.
Wagner's Terriers could find more joy playing against the top flight's weaker sides if they continue in like manner.
But Sarri believes he is not even close to getting the best out of his side.
Substitutes: Lossl, Smith, Diakhaby, Ramadan, Van la Parra, Depoitre (6), Stankovic. If you look at the result you can think of an easy game.
"We played well. The players have shown commitment, desire, passion and created chances".
But the game turned decisively towards the visitors when Chelsea doubled their advantage just before the interval as Marcos Alonso burst into the area and went down under challenge from Christopher Schindler. After a choppy opening half hour, N'Golo Kante made the breakthrough and, from that point on, there was only going to be one outcome. Jorginho coolly converted the penalty.
France World Cup victor N'Golo Kante volleyed in the opener in the 34th minute, Jorginho netted a penalty on his Premier League debut before halftime and Pedro drove home the third with an angled drive after the break.More news: Last Solar Eclipse of 2018 to Occur today
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The Frenchman was replaced in the hole by new signing Jorginho, who has followed his manager from Napoli to south-west London.
"I want to do a good Chelsea".
As for Jorginho's spot-kick, he was made to look silly.
Spain worldwide goalkeeper Kep Arrizabalaga became the most expensive goalkeeper in history by completing a £71m move from Athletic Bilbao and made an assured debut in Saturday's 3-0 win over Huddersfield.
Sarri's half-time talk proves effective: There was some cause for concern after Chelsea's first-half performance.
The former Madrid man did well to hold the ball up and knock aerial passes down, yet his first touch let him down at times and he gave the ball away on a few occasions with wayward passing.
One striker who will not be scoring goals for Chelsea this season is Michy Batshuayi, who has joined Valencia on a season-long loan.
Next up for Huddersfield is a daunting trip to take on champions Manchester City at the Etihad a week on Sunday, a match you can see live on Sky Sports Premier League.