Willem II are still searching for their first Eredivisie win of the season after a 1-0 home defeat against NEC Nijmegen.
NEC Nijmegen were relegated from the Eredivisie after defeat to Sparta Rotterdam in the promotion/relegation play-offs.
Alireza Jahanbakhsh was NEC Nijmegen's hero with a two-goal haul helping to beat Ajax, condemning Roda JC to the drop.
In association with Wyscout, the Sky Sports Scout looks at Iran winger Alireza Jahanbakhsh.
Ajax clinched their fourth successive Eredivisie title with a 1-1 draw against Heracles Almelo on Sunday.
Ajax will have to wait to get their hands on the Eredivisie trophy after Feyenoord matched their victory on Sunday.