Kasper Dolberg scored twice as Ajax beat rivals Feyenoord 4-1 in the Eredivisie on Sunday.
Feyenoord missed the chance to go level on points with Eredivisie leaders PSV after being held to a goalless home draw by PEC Zwolle.
Feyenoord won 4-0 at AZ to climb up to second, Ajax beat Heerenveen by the same scoreline while Vitesse and Utrecht drew 1-1.
Yuki Kobayashi fired a second-half winner as Heerenveen climbed top of the Eredivisie table with a 2-1 victory at Willem II.
Heerenveen secured a surprise 2-0 home win over 10-man PSV Eindhoven on Sunday.
PEC Zwolle moved to the top of the Eredivisie with a 2-0 win at home to FC Twente on Saturday.
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