Amsterdam football club Ajax stretched its premier division lead to six points on Sunday with a 3-1 win over relegation candidate De Graafschap.
Feyenoord is now level with AZ in second place with 58 points after a 3-0 win over bottom-of-the-league Excelsior.
Twente, PSV and Heerenveen are just one point behind on 57 with four games left to play.
On Saturday, PSV Eindhoven scored a last minute goal to beat second-placed AZ of Alkmaar 3-2. FC Twente drew 2-2 against NAC after the Breda side equalised in stoppage time.
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