In a tense first half, Chelsea took the lead through N'Golo Kante after a quick counter-attack and Jorginho doubled their advantage just before half-time from the penalty spot.
Italy worldwide Jorginho passed home a fearless penalty in the 45th minute as Maurizio Sarri earned his first competitive win at the helm after his team went down to Manchester City in the Community Shield last weekend, while fellow debutant and the world's most expensive goalkeeper Kepa Arrizabalaga started with a clean sheet.
Here are the winners and losers from the match.
Crucially Chelsea have held onto Eden Hazard, but while the Belgian was only deemed fit enough for a place on the bench following his World Cup exertions, N'Golo Kante was thrown straight into the side after starring in Russian Federation for world champions France.
Huddersfield, too, can take heart from the performance, certainly in the first half.
Kante volleyed the Blues ahead on 34 minutes after neat approach play from Pedro and Willian.
Kante is already recognised as one of the better midfielders in Europe for his ability to appear in many places at one time defensively.
However, Sarri has looked to lower the expectations on his new signing by insisting Kepa - who could make his debut against Huddersfield Town on Saturday - still has a lot of improving to do before he can reach the level of Courtois.
And that was when Chelsea grew into the game, with the Italian getting a feel of the opposition and exposing their weaknesses with the same quick short passes which he did so well at Napoli. 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. It is to his credit that the Chelsea back four were happy playing right on top of him as well.
There were occasional signs of hesitancy in defence early on that a stronger team than Huddersfield might have exploited, but to criticise Chelsea beyond that would be harsh.
Chelsea was the league's biggest spenders in the summer transfer window. Jorginho stepped up and cooly found the back of the net.
"We were in trouble for 15 minutes against a physical team, we are not a physical team". You can't switch on against a top-quality team like Chelsea.
Huddersfield fans will have felt the half-time score was harsh, but Chelsea set about extending their lead after the restart. But things do look bright at the back for the Terriers.