Here are the key lines from the news conference:
On Jason Steele's new contract, he said: "He's very important on the pitch and off the pitch. He deserved a new contract."
He added: "Jason is playing well, he knows very well my idea."
De Zerbi said he is lucky to work with players like Steele and added: "I try to help them show their potential, their quality."
On going four Premier League games without a win, De Zerbi said: "We are working well but I am not happy about our performances."
He added: "We lost three important players but we have to push more and play better. We are conceding too many goals and have to do better."
On Everton, he said: "They know their quality, they have good players. We have to be more focused with more match attitude."
On if the Toffees are better this season under Dyche, he added: "They have a different energy and style of play. They are very direct, they are a good team."
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