Bayer Leverkusen legend Jens Nowotny has tipped Chelsea transfer target Kai Havertz to become a world-class player.

Nowotny told Goal and Spox: “Havertz is on the way to becoming a world-class player. He has huge potential.

“Another year in Leverkusen would certainly not hurt him. “For his personal development as a player and as a person it would be good for him to be in an environment in which he feels comfortable.

“That’s the case in Leverkusen. Otherwise he would not have already spent ten years at the club. “To fulfil his potential, the next step is very, very important. He has to ask himself questions.

“Are there clubs where he can develop if there is a possible change? “Or are there only clubs where he has to arrive and function as a finished player?

“On the one hand, you need coaches like Klopp, Guardiola or Mourinho, who can take him further. “On the other hand, such a coach also hats work for a club where he is allowed to develop.

“He could develop at Bayern Munich, but he would have to win his chance to play first and foremost. “That works better for some clubs that for others. For a young player, Borussia Dortmund may be better than Bayern Munich in terms of club and environment.”

The 20-year-old is widely regarded as one of the best young talents in Europe and is valued at £100 million by Leverkusen.