Ajax's Anwar El Ghazi scored twice in a 4-0 win over ADO Den Haag that took them clear at the top of the Dutch league on Sunday.
Feyenoord forward Dirk Kuyt is back 'home' in Rotterdam and searching for silverware.
There were wins for Ajax and Feyenoord in the Eredivisie on Sunday, while FC Twente slipped to defeat.
Feyenoord and Roda JC secured opening day victories in the Eredivisie.
Dutch winger Eljero Elia has joined Feyenoord on a two-year deal, leaving Werder Bremen after three seasons.
Ronald Koeman returned to Feyenoord as Southampton ran out 3-0 winners in the pre-season friendly at De Kuip