Allan will be reunited with Carlo Ancelotti at Everton after securing €25 million plus bonuses move to the Merseyside.
Everton finished the Premier League season in 12th place. Carlo Ancelotti managed to steer them away from relegation slots but he will be unhappy with their post lockdown form.
The Italian saw his team lose out the possession battle and come under pressure in midfield. His solution is to revert to known quantities. Ancelotti has secured the services of Allan, who he is familiar with during his Napoli managerial stint.
Allan was pleased with the move and thanked the San Paolo faithful for their support.
“Naples is a special city,” Allan wrote on Instagram.
“These have been five fantastic years for me and my family: my children speak, think and dream in Neapolitan.
“I am therefore grateful to President De Laurentiis who allowed me the chance to wear this glorious jersey. I grew up in this club, as a professional and a man, able to work with coaches and professionals I will always be grateful to.
“I was fortunate to find along this journey some teammates who were also like brothers. The last season was difficult. But the victory in the Coppa Italia was the best way, the right way, to close an experience where I felt like a protagonist.
“A special thanks goes to the fans: it was a privilege and an honor to be, over these years, your very own ‘Neapolitan Mastiff.’ I send them my biggest embrace. Allan.”
Allan is the only first-team addition the Toffees have made this season. Young Niels Nkounkou has also been added but lacks experience at the top level.