PSV PSV remain top of the Eredivisie but only by goal difference after losing 1-0 to Heerenveen as both sides finished the game with 10 men.
Heracles Heracles ended a run of seven consecutive Eredivisie defeats in spectacular fashion as they trounced 10-man NAC Breda 6-1 on Saturday.
Vitesse Two late goals lifted Vitesse Arnhem to the Eredivisie summit on Saturday with a 3-1 win over Utrecht.
PSV PSV Eindhoven missed the opportunity to go back to the top of the Eredivisie as they were defeated 1-0 at Groningen on Sunday.
PSV Ernest Faber has called on PSV to "finish the season in style" and the Eredivisie leaders will be expected to move another step closer to winning the title by beating Dordrecht.
Ajax Ajax head to PSV on Sunday and the Philips Stadion may as well be called the last chance saloon as far as the defending champions' title hopes are concerned.
Vitesse Vitesse Arnhem will face a tough challenge to keep pace with Eredivisie leaders Ajax Amsterdam when they travel to Feyenoord on Friday.
Twente Twente will be out to breathe life into their faltering Eredivisie title hopes and derail leaders Ajax when the two meet this weekend.
PSV Eredivisie leaders PSV take on Go Ahead Eagles on Saturday as they look to strengthen their position heading into the mid-season break.
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