Timo Werner insists Chelsea teammate Kai Havertz will only get better and better.

The 21-year-old, signed from Bayer Leverkusen this summer, has contributed four goals and three assists across his first 10 appearances for the Blues.

"I know Kai very well and I think he is one of the most talented players in the whole world," the Chelsea striker said ahead of a Champions League clash with Rennes on Wednesday.

"He is a young boy, only 21 and he can learn a lot but can already play like a very, very old and wise player. I think up until now he feels very well here. A bit like me, we have talked a lot about settling in and he feels he is very happy to be here. In a lot of games he has shown what he can do, what he can bring to the team.

"For Kai it is very important to score, but I think what you can see in his game, he is about a lot more than scoring goals as a midfield player. He plays a lot of key passes, makes a lot of movement for other players.

"He is very talented and feels good. He will get better and better, like me he has come to a new country, language and style of football and has to learn.

"But until now he plays very good and we will see a lot more good games from him."