Havertz is one of the hottest properties in German football and the Blues spent an initial £62million on capturing him from Bayer Leverkusen in the summer.
The 21-year-old was joined by his compatriot Timo Werner and Hakim Ziyech to form a mouthwatering front line which also includes Christian Pulisic.
Chelsea have scored three or more goals in nine of their 13 games this season, making them the team to watch so far.
Bayern Munich were also interested in Havertz but he opted to make the move to London.
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Meanwhile, Blues boss Frank Lampard has expressed his delight at how Timo Werner has settled into life in English football.
On Saturday, Werner scored his eighth goal in 12 appearances since the summer move from RB Leipzig.
And Lampard expects the German forward to continue getting better.
"I’m really pleased with Timo because when you make a big move, everybody expects you to come in and hit the ground running," Lampard told Chelseafc.com.
"They expect him to know every pass that they [his team-mates] want to make and them to know every run he wants to make.
"It doesn’t work that simply so there’s always a period where you’re striving on those levels.
"For Timo to produce those numbers and have the impact he’s had so far shows the quality levels of him.
"He’s very easy to manage, I’m enjoying it and I think he’s going to get even better for us."
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