Robin van Persie scored a late winner and was then sent off as Feyenoord kept pace with second-placed Ajax in the Eredivisie with a stormy 2-1 win over Vitesse.
PSV emerged handsome winners in the De Topper derby by beating Ajax 3-0 at the Philips Stadion.
PSV Eindhoven continued their winning start to the new Eredivisie season as they thrashed ADO Den Haag 7-0 on Saturday.
Ajax climbed into second place behind Eredivisie leaders PSV Eindhoven by thrashing Vitesse Arnhem 4-0 on the road on Sunday.
Luuk de Jong scored a brace as defending champions PSV Eindhoven claimed a late 2-1 victory over PEC Zwolle, while Ajax thrashed Emmen.
The 2017 Eredivisie winners Feyenoord were shocked 2-0 by De Graafschap in their first game of the new league season.
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