PSV Eindhoven missed the chance to move three points clear at the top of the Eredivisie as they lost 1-0 at Heerenveen.
Go Ahead Eagles recorded their first win of the Eredivisie season with a 1-0 success at home to Willem II.
Willem II beat AZ 3-0 for their first points of the Eredivisie season on Saturday, while Heerenveen also won.
Ajax responded to PSV Eindhoven's statement of intent with a 3-1 victory at AZ Alkmaar in the Eredivisie.
Ajax began their Eredivisie title defence with victory over Vitesse, as Groningen, PSV Eindhoven and Feyenoord also won.
Ajax rounded off their title-winning season with a 2-0 win at FC Groningen on Sunday.
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