كتب : وكالات
Siem de Jong and Mounir El Hamdaoui scored in either side of the interval to help Martin Jol's side win their fifth game out of six.
Once again, there was no place for striker Mido in the match squad as he has yet to regain fitness.
The Amsterdammers reached 16 points, two ahead of Groningen and three above PSV Eindhoven, who play at Roda later.