AZ edged out PEC Zwolle 1-0 in the Eredivisie this afternoon thanks to Marcus Henriksen's strike.
The home side had a number of efforts saved by Zwolle keeper Warner Hahn in the first half, with Muamer Tankovic going closest.
The visitors had the ball in the net on the half-hour mark, but Tomas Necid was adjudged to have used to hand in the build-up.
Necid then hit the bar in the second half before Henriksen grabbed the winner on 72 minutes.