Ajax moved a step closer to reclaiming the Eredivisie title on Sunday with a thumping 4-0 win over FC Twente.
Ajax slipped up but still moved back to the top of the Eredivisie table with a 2-2 draw at home to FC Utrecht.
Ajax failed to take advantage of PSV's Saturday slip-up as they dropped their first points in five Eredivisie games at home to NEC.
Defending Eredivisie champions PSV maintained their one point lead at the top of league with a comfortable 3-0 win away at Nijmegen on Sunday.
PSV Eindhoven climbed to the top of the Eredivisie with a 4-2 victory over De Graafschap on Saturday.
Ajax extended their gap at the top of the Eredivisie with a narrow 1-0 victory at home to Vitesse on Saturday.
Amin Younes gave Eredivisie leaders Ajax a 1-0 win at ADO Den Haag, while PSV won 2-0 at Feyenoord on Sunday.
Dirk Kuyt's impressive scoring form continued for Feyenoord on Sunday as the Rotterdam club beat Heracles Almelo 3-0 at home.
Feyenoord lost ground in the Eredivisie title race after a shock 1-0 loss against ADO Den Haag.
There were Eredivisie wins for both Ajax and PSV on Saturday, while second-placed Heracles slipped to defeat.
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.
FC Twente boosted their hope of a top-two finish in the Eredivisie with a 2-0 win at NAC Breda, while PSV were thrashed.
Second-placed PSV Eindhoven dropped points at home as they were beaten 3-2 by Groningen on Saturday.
PSV moved to second place in the Eredivisie after they beat Roda JC and Vitesse Arnhem were beaten by Groningen.
Manchester United defender Marnick Vermijl is looking to make the first-team squad next season or may leave the club.