De Zerbi is back in Italy tonight to face Roma in the Europa League.
The former Sassuolo coach said: "It wouldn't be true if I said I wasn't thinking about Italy. It's my country, but I do what makes me happy, which Brighton makes me.
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"Of course there was a reason why I took the step away from Italy three years ago.
"Without going into details, there were some things I didn't care about and I wanted to make my own way."