The Eagles have been given permission to speak to the 26-year-old Dutchman, who had submitted a transfer request, and he will now travel to London in a bid to push through his move.
Black Cats chief executive Martin Bain said: "If a player openly states he does not want to play for our club, then it is clear that we have a decision to make
In this instance and in regard to this particular player, we have done what we feel is right for Sunderland, which will always be our priority."
Source : PA
Source: PA