Overall, it was a promising weekend for Premier League debutants. Timothy Castagne impressed for Leicester City, James Rodriguez shone in Everton’s midfield and Gabriel looked commanding at the back for Arsenal.

However, Kai Havertz was unable to reach a similarly high level during his Chelsea bow.

The 21-year-old attacking midfielder was turning out for the Blues for the first time following his big-money move from Bayer Leverkusen as Frank Lampard’s side opened their league season with a 3-1 win away to Brighton & Hove Albion.

But while fellow debutant Timo Werner - who won the penalty for Chelsea’s opener - looked lively and Reece James caught the eye with a goal and an assist, Havertz struggled to make an impression before being replaced by Callum Hudson-Odoi with 10 minutes remaining.

While several of Lampard’s new recruits were not involved at the Amex Stadium, Havertz lined up alongside Werner in a rejuvenated Blues attack, with the German, Ruben Loftus-Cheek and Mason Mount behind the former RB Leipzig striker in a 4-2-3-1.

Havertz's debut was underwhelming as he featured in Chelsea's win over Brighton

But Havertz struggled to impose himself on the game against a lively Brighton side that caused Chelsea plenty of problems, managing just 38 touches during his time on the pitch.

Havertz completed 88 per cent of his 25 attempted passes but managed to complete only one pass into Brighton’s penalty area.

He also lost eight of his nine attacking duels and failed to touch the ball inside the Seagulls box.

In one key moment, Havertz wasn’t quite able to capitalise on some promising attacking scenarios. Having controlled Marcos Alonso’s throw-in impressively on the half-turn, he spotted Werner darting down the left flank into space.

Havertz took the throw in this stride and looked to set Chelsea racing
Havertz tried to play the ball through to Werner

However, under pressure from Ben White, the German misjudged the weight of his pass and allowed Lewis Dunk to intercept and safely play the ball back to Mat Ryan.

Had he executed the pass and continued his run, he possibly could have had a presentable goalscoring chance had Werner returned the ball into the box.

But Havertz’s worst moment arrived eight minutes into the second half when his wayward pass gifted Brighton a throw-in in an attacking area, from which Chelsea were unable to pass the halfway line before Leandro Trossard’s equaliser.

Havertz still has plenty to work on with Chelsea

Although he was settling himself into a new team, Lampard’s system was not wholly different from what Havertz is used to.

In his final game for Leverkusen, he played on the right of the three behind Kevin Volland in the German side’s Europa League quarter-final defeat by Inter Milan.

In the previous round, he played centrally behind Volland as Bayer edged Rangers although he did play up top in the DFB Pokal final defeat by Bayern Munich.

Havertz has previously stated, however, that he sees himself as a No.10, where he can have more touches of the ball and drop into central pockets of space from where he can shoot.

There will be more to come from Havertz in the coming weeks

While his debut was undeniably underwhelming, it is important to remember that he is still acclimatising to his new surroundings after only one week of training with his new club.

Werner, in contrast, linked up with the Blues much earlier and even had the benefit of a dress rehearsal against Brighton at the Amex, scoring in the pre-season friendly draw with the Seagulls in August.

The Germany international looked far from razor-sharp but then again there are several Premier League players who are not at their best following a condensed, disjointed pre-season that was disrupted by an international break immediately prior to the start of the new league campaign.

And that is not to say that Havertz’s debut was a disaster. He showed some impressive touches on the half-turn and took up some promising positions in space when Chelsea flooded forward.

He also attracted praise from Lampard for running almost the entire length of the pitch to dispossess the lively Solly March having lost out to the Brighton winger in attack.

"We also saw him sprint back 80 yards to make a defensive tackle having given the ball away,” Lampard told Sky Sports following the game.

“So everything I have seen about his character is spot on."

While Havertz’s Chelsea career got off to a relatively inauspicious start, there will be plenty of opportunities for him to quickly remind fans why the club parted ways with such a significant sum to secure his services.

Havertz was taken off after 80 minutes of his debut for Chelsea

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On Sunday, the Blues host Liverpool at Stamford Bridge. While Lampard switched to a 4-2-3-1 for the Brighton game, the Chelsea boss may ponder reverting back to his trademark 4-3-3 for the visit of the champions.

In that system, Havertz would be comfortable playing as the most advanced midfielder, or he could be deployed through the middle, behind Werner, if Lampard persists with a 4-2-3-1.

There is a tendency to read too much into a quiet debut, just as there is a tendency to rave excessively about an impressive one.

Havertz’s Chelsea career may have begun with a whimper, but even at 21, his impressive body of work to this point strongly suggests that his struggles at the Amex won’t be a precursor for what is to come.