Meanwhile, Leverkusen sporting director Simon Rolfes has explained why the price of Havertz and Borussia Dortmund winger Jadon Sancho, who is wanted by Manchester United, will not drop.

”You have to differentiate,” Rolfes said. ”With many normal players, things will change and clubs will also act differently.

”But these are two exceptional players who are very rare and therefore have value. That is why we see the situation very relaxed there.”

He added: ”[Havertz] is focused,” Rolfes said of the midfielder. ”Kai is relaxed with the speculations, is focused, in a good mood.