The Germany international has been criticised for not scoring enough goals since joining from RB Leipzig in the summer of 2020.
However, Werner has revealed how the criticism has no impact on his self-confidence.
He said: "It has to roll off you, because if I had been thinking too much about the days, then I would not have been able to play today.
"At some point the barrel will be full. I know what I can do and so I go into every game with that mindset."
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