Leaders AZ Alkmaar secured a narrow 1-0 win at Utrecht, while Feyenoord defeated PSV Eindhoven.
Maarten Martens scored the 12th-minute winner for AZ who hold an 11-point lead over Steve McClaren’s FC Twente.
Ajax are third and hit three goals against De Graafschap. Two goals from Luis Suarez, the second a penalty 20 minutes from time, sandwiched a goal from Dario Cvitanich in the 3-0 win.
Leroy Fer scored in the 73rd minute to give Feyenoord a 1-0 win against PSV Eindhoven.
Timothy Derijck, Richard Knopper and Chris Kum were among the goals as ADO den Haag defeated NEC Nijmegen 3-0.