Feyenoord moved up to second in the Eredivisie with a 2-0 victory over PEC Zwolle while FC Twente ended their winless start.
Heracles Almelo moved to the top of the Dutch league with a 2-1 win over champions PSV Eindhoven at the Polman Stadion on Saturday.
Ajax's Anwar El Ghazi scored twice in a 4-0 win over ADO Den Haag that took them clear at the top of the Dutch league on Sunday.
There were wins for Ajax and Feyenoord in the Eredivisie on Sunday, while FC Twente slipped to defeat.
Michael de Leeuw rescued a point for Groningen in a 1-1 draw with Twente in the Eredivisie on Wednesday, as NEC beat Excelsior 1-0.
AZ claim a Europa League place at the expense of Feyenoord, who were consigned to the play-offs for a place in Europe.