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Chelsea fans have been left unimpressed with the performance of superstar signing Kai Havertz, since he made the switch from Bayer Leverkusen to Chelsea.

The 21-year-old was supposed to be the biggest signing of the summer for Chelsea, and even in the Premier League, but he has failed to adjust quickly to his new team.

On Saturday against Everton, Havertz put in another disappointing performance in the absence of Hakim Ziyech and Christian Pulisic, much to the dismay of the fans.

Signed up for almost £72m, a Chelsea fan has told Leverkusen to pay back some balance to Chelsea, as he believes that the Blues overpaid to sign up the highly-rated 21-year-old German.

Meanwhile, Chelsea legend Frank Leboeuf blamed Thiago Silva and Edouard Mendy for their mistake in the penalty goal scored by Everton.

“I think Chelsea did well in the middle of the park in terms of possession of the ball but they were bad defensively,” the former Blues defender told ESPN FC.

“We saw that penalty that Mendy conceded but I think I will put Thiago Silva guilty for the penalty as well because he didn’t attack the ball, he was hesitating, he thought that Mendy would go out which he did but too late.”