Markus Henriksen netted a late winner as AZ strengthened their grip on fourth place with a 2-1 win over Cambuur Leeuwarden.
Vitesse claimed their seventh Eredivisie win in eight matches but left it late to beat AZ Alkmaar 3-1.
AZ Alkmaar had to overcame blustery conditions to beat Willem II 2-0 to reclaim third place in the Eredivisie on Saturday.
Luuk De Jong scored a hat-trick as PSV strengthened their grip at the top of the Eredivisie after a 4-2 victory at AZ.
A calamitous error by Go Ahead Eagles goalkeeper Mickey van der Hart gave parent club Ajax a 2-1 win.
AZ Alkmaar inflicted a second league defeat in four days upon Ajax as they registered a 1-0 win at the Amsterdam ArenA.
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