Everton midfielder Allan is convinced he can achieve big things at Goodison Park.
During his five years in Naples, the 29-year-old won the Coppa Italia and spent three years playing in the Champions League and two playing in the Europa League.
"I was at Napoli for five years, mostly victorious, with good games, and great campaigns in the Champions League," he told a Brazil national team press conference.
“Unfortunately, some bad things happened, both for me and for the club. Things that happen anywhere, we get sad, of course.
“My time at Napoli had come to an end, it was time to change air, get to know a new culture, a new club. I hope to do great things at Everton, as I did at Napoli."
He added: “Richarlison has helped me a lot in the beginning of the season, on arrival at Everton, on the pitch too. I hope that we can continue making good games, at the club and at the Brazilian team."