Shota Arveladze's first-half penalty was enough to earn AZ a nervy 1-0 win over 10-man Vitesse.

The Georgian frontman converted in the 23rd minute after he was brought down in the box by Purrel Frankel to move his side back into second spot, two points behind leaders PSV Eindhoven.

Vitesse's Siebe Blondelle was dismissed in the 49th minute for a professional foul, leaving the visitors a man down for the majority of the second half.

Feyenoord, meanwhile, suffered a humiliating 4-1 reverse at Heracles Almelo.

The ailing Rotterdam giants were thrashed 4-0 at their De Kuip stadium by FC Groningen last week, but must have not expected a repeat from relegation-threatened Heracles.

Brazilian striker Afonso Alves bagged a second-half hat-trick to give Heerenveen a 3-1 win at struggling Willem II.

FC Groningen won 4-1 against NEC Nijmegen.