German great Michael Ballack says Kai Havertz should stay with Bayer Leverkusen.

The midfielder is interesting Liverpool, Manchester City and Barcelona.

But Ballack told BILD, "Players with his quality are in demand everywhere, but I think he's in good hands in Leverkusen.

"The general conditions there are perfect for top young players and their further development. Leverkusen play attractive football, the training opportunities are very good. Leverkusen also offers a cautious environment.

"As a [Bayer Leverkusen] player you can sometimes make mistakes without being the focus of criticism - you should appreciate that. Of course, a player like Havertz would also like to play in the Champions League, so it would be important for Leverkusen to qualify."