Do you think Italian Tennis Player Jannik Sinner has a weakness? If so what do you think it is?

This question was inspired by reports stating that after a tennis match in which Sinner won, the tennis player who lost against him stated that playing against him is like trying to fight AI. Share your thoughts if you have any.
Do you think Italian Tennis Player Jannik Sinner has a weakness? If so what do you think it is?
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