Nicolai Jorgensen netted a brace as Eredivisie leaders Feyenoord thrashed city rivals Sparta Rotterdam 6-1 at De Kuip.
PSV Eindhoven remain third after only drawing 0-0 at Willem II on Saturday, while Excelsior, Heracles and Groningen all won.
PSV Eindhoven extended their unbeaten Eredivisie run to six games but were held to a 1-1 draw against FC Twente.
Hakim Ziyech's strike was enough as Ajax edged Excelsior with a 1-0 win to keep the pressure on Eredivisie leaders Feyenoord.
PSV Eindhoven closed the gap on second-placed Ajax to just a point with a 1-0 win over Sparta Rotterdam at Philips Stadion.
Feyenoord maintained their winning start to the Eredivisie season at Willem II, while there was also a win for Ajax.
Feyenoord maintained their perfect start to the Eredivisie season with a 5-0 victory over struggling Roda JC 5-0 on Sunday.
On-loan Manchester City teenager Enes Unal scored twice as FC Twente beat Den Haag 4-1 in their Eredivisie clash at De Grolsch Veste.
Luuk de Jong capped a 24-minute blitz as PSV stormed back to the top of the Eredivisie with a 4-1 win over NEC in Nijmegen.
Dirk Kuyt scored twice as Feyenoord came from behind against Excelsior to maintain their 100 per cent Eredivisie record.
Defending champions PSV Eindhoven defeated PEC Zwolle 4-0 to secure top spot in the Eredivisie.
Eredivisie champions PSV made it two wins from two as Hector Moreno's goal secured a 1-0 victory over AZ Alkmaar, on Sunday.
Ajax moved a step closer to reclaiming the Eredivisie title on Sunday with a thumping 4-0 win over FC Twente.
AZ Alkmaar took a grip of fourth place in the Eredivisie with a 2-1 win over ADO Den Haag.
Ajax slipped up but still moved back to the top of the Eredivisie table with a 2-2 draw at home to FC Utrecht.
Davy Klaassen's goal handed Ajax a 1-0 win at bottom club SC Cambuur on Saturday that maintained their two-point lead at the top of the Eredivisie.
Marko van Ginkel scored twice as PSV returned to the top of the Eredivisie table with a 4-2 win at AZ Alkmaar on Saturday.
Eredivisie leaders PSV Eindhoven were held to a frustrating 1-1 draw by Heerenveen at Philips Stadion on Saturday.
Ajax closed the gap to Eredivisie leaders PSV Eindhoven back to a single point after thumping Willem II 4-0 on Sunday.
Ajax beat Excelsior 3-0 to close the gap at the top of the Eredivisie on Sunday, while Dirk Kuyt was on target for Feyenoord.