He told the Telegraph: "I watch every Chelsea match, so I have followed the debut season for the club's two big German players, Kai Havertz and Timo Werner, very closely. I'm convinced we'll really see the best of them next season.
"Players like Werner are so valuable today because players often want the ball at their feet. As a midfielder, you want this type of player to run towards your passes."
On Werner's confidence crisis, Cesc also said: "I would definitely still try to find him in matches, because that's the worst feeling you can have when your own teammates start to doubt you, because you feel it.
"What I like is to always talk to people in a positive way. Even if they miss training, you say 'well done, the next one goes in'. Although it must be 100 times. Football is so much about self-confidence and what's in your head. This is especially true for strikers who are so dependent on scoring goals or not scoring goals."
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