Feyenoord lost ground in the Eredivisie title race after a shock 1-0 loss against ADO Den Haag.
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.
Wout Weghorst scored the only goal as high-flying Heracles beat ADO Den Haag 1-0 to climb to second in the Eredivisie.
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.
ADO Den Haag goalkeeper Martin Hansen has described his incredible last-gasp equaliser against PSV Eindhoven as "pure instinct".
ADO Den Haag goalkeeper Martin Hansen scored an incredible goal in the 95th minute against PSV in the Eredivisie.
Swansea have confirmed winger Kenji Gorre will move to Dutch side ADO Den Haag on a one-year loan deal.
AZ claim a Europa League place at the expense of Feyenoord, who were consigned to the play-offs for a place in Europe.
NAC Breda face a relegation play-off, while Manchester United-bound Memphis Depay scored for PSV.
Michiel Kramer netted a late winner in a 1-0 victory over Vitesse which all-but confirmed Den Haag's Eredivisie status.
Feyenoord moved a step closer to qualifying for the Europa League after a 2-2 draw at Willem II Tilburg in the Eredivisie.
PSV Eindhoven suffered a bump on the road to a probable Eredivisie title as they lost 2-1 at Feyenoord on Sunday.
Defender Nicolas Isimat-Mirin scored a rare goal to hand leaders PSV a nervy 2-1 home win over Groningen.
Ajax staged a late rally to beat PSV Eindhoven 3-1 on Sunday to give their faint title hopes a boost.
Feyenoord slipped 20 points behind leaders PSV in Eredivisie after a 2-0 defeat at lowly Heracles on Saturday.
Ajax lost 1-0 at Vitesse Arnhem on Sunday to fall further behind PSV in the Eredivisie title race.
PSV Eindhoven re-established their four-point lead at the top of the Eredivisie after edging to a 1-0 win at Vitesse.
PEC Zwolle moved up to fifth in the Eredivisie as they beat ADO Den Haag 3-1 and FC Twente drew 2-2 against Vitesse.