“I’m ready to take a big step, and I like challenges. For me, this also includes abroad,” Havertz recently told SportBild.

“Leverkusen are a great club, I feel good. I have always said that. But of course I want to take the next step in my career at some point. That’s my ambition.

“The coach is a very important person for me. It must be a good fit. You can see that with our coach, Peter Bosz. For me, the sporting direction of the club is also reflected in the choice of coach.”

Leverkusen sporting director Simon Rolfes has admitted that it will be hard to keep hold of Havertz, and didn’t rule out a departure this summer when he spoke to Bild last month.

“It’s a logical development that Kai will leave Leverkusen at some point,” Rolfes said.