Boateng told TV Play: "If I had De Zerbi 10-12 years ago, football would’ve been different. I think he will be the best coach of the next 20-30 years. He has been able to improve every single player he worked with, from the understudy goalkeeper to the striker. I worked with him when I was 32 years old and I felt stronger than I’ve ever been. De Zerbi makes you feel really involved, he knew how to coddle me when I needed it, to motivate me when I needed that. He really looks after the human rapport aspect of management and that is fundamental."
He added: "Is De Zerbi better than Guardiola? I say yes."