Former Chelsea star Timo Werner has offered Christopher Nkunku some advice about the Premier League.

The German knows what it takes to succeed and not succeed in the English top flight.

Despite his best efforts, Werner was not able to show his form at Chelsea, and has since moved back to RB Leipzig in the Bundesliga.

Asked about teammate Nkunku by German outlet SportBILD, Werner said: "Everyone has to have their own experience.

"I had a very good first year, the second was so-so. I can tell him from positive and negative experiences, should he change.

"At a club like that, you don't play like you did at RB Leipzig, because there's even more competition – not only on a sporting level, but also on another level, in the mental area. You have to cope with that, and everyone has to find their own way.

"That's why it's the wrong approach to give others tips. Time has changed me a lot."