The 37-year-old has recovered from surgery on a neck hernia but does not want to risk playing in his team´s final two games of the season.
"I am now fully fit again but the competition in Qatar is over in two games and I don´t want take the risk to get injured again," De Boer told Dutch newspaper De Volkskrant.
Copyright (c) PA Sport 2008, All Rights Reserved.
Do YOU want to write for GiveMeSport? Get started today by signing-up and submitting an article HERE: http://gms.to/writeforgms