There is a view held by some in his native Germany who have followed his career closely that Kai Havertz has all the potential to eventually become one of the best players in the world.
There have also been suggestions that he was effectively bought for Chelsea as a gift from Roman Abramovich.
That, beyond sanctioning the deal that could reach a club record £85m, this was one of those Chelsea transfers the owner had extra involvement in, Abramovich wanting him in Blue as much as anyone else involved in the signing process.