Midfielder Gravesen has struggled with injuries this season and has started only three games during his loan spell from Celtic.

Wessels, signed from Cologne last summer on a one-year deal, will also depart having made seven appearances as Tim Howard's understudy.

Toffees chief David Moyes told the club's website, evertonfc.com: "I would like to thank Stefan Wessels who, after today, will be leaving us. His level of professionalism has been a credit to him and he has been a great man to have around the club.

"Thomas Gravesen will also depart following the completion of his season-long loan. He deserves thanks for both his spells here and we wish him well for the future."