Ajax have been dealt a crushing blow with the news that captain Jaap Stam has picked up a hamstring injury.
Leaders PSV Eindhoven's stuttering form has allowed Ajax to close to within three points with four games remaining.
Ajax were impressive winners over Heracles Almelo on Sunday, but the win came at a cost as Stam limped out of the game with a hamstring problem.
The club expect him to be sidelined for a number of weeks and he joins Czech star Zdenek Grygera in the treatment room.
Ajax have been boosted by the return to training of Thomas Vermaelen who has been out for two months with a knee complaint.
Daley Blind, the son of Ajax and Holland legend Danny Blind, has signed a deal which binds him to the club until 2010.