Ilkay Gundogan has described Kai Havertz’s potential as “unlimited” as the German starlet gets set for a move to Chelsea.

The London club officials are reportedly locked in transfer negotiations with the Bundesliga club in order to complete the star’s move to Stamford Bridge.

Leverkusen are desperate to get the best out of the attacking midfielder in what would surely be his last few games for Bayer in the Europa League, starting tomorrow night in their second leg against Rangers.

The Manchester City ace told Bild: “I expect great things from him. Kai’s potential is unlimited, there are no limits.

“He brings a lot with him, and now it’s up to him to show off this enormous talent.

“He has this calm and serenity on the ball, and is a prudent type on the other side.”