Former Chelsea star Timo Werner has warned RB Leipzig team-mate Christopher Nkunku that he will face a different level of pressure and scrutiny when he moves to Chelsea.

Chelsea have completed the signing of Nkunku from RB Leipzig, with the France forward set to move to Stamford Bridge next summer.

Werner, who left Chelsea for RB Leipzig last summer, admits he had a turbulent time in west London and has told Nkunku he will face more competition and more pressure when he swaps RB Leipzig for Chelsea.

“Everyone has to have their own experience,” Werner, who scored 23 goals in 89 games for Chelsea, told Bild.

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

“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.

“My time there has changed me a lot. It made me more mature, more reflective. And made me want to go abroad again at the end of my career.

“I still get a lot of letters from Chelsea fans or am addressed on vacation – almost always positively. I think they liked that I was authentic.

“I think it’s important that you can be who you are in football too. And you don’t always have to pretend.”