The Senegal forward scored eight Premier League goals for Everton this season.
Coaches like Eddie Howe might sound better but it is no surprise that Big Sam was the man for Everton this season.
Ronald Koeman has backed Ajax's Hakim Ziyech to join Everton.
Klaassen has flopped at Everton since in his move from Ajax last summer.
Everton recently put out a survey asking season ticket holders and club members to rate manager Sam Allardyce.
Former Everton striker Tim Cahill recently claimed the club have lost their identity.
Former Everton star John Collins has blasted the club for its treatment of Ronald Koeman and delivered his verdict on life under Sam Allardyce.
Ronald Koeman brought Jordan Pickford to Everton last summer.
Everton reportedly wanted to sign Virgil van Dijk when the Liverpool defender was at Southampton.
Everton are being linked with ex-Barcelona boss Luis Enrique.