Feyenoord made it four consecutive wins in the Eredivisie with a comfortable 4-1 victory at AZ.
It took the visitors just three minutes to open the scoring as some woeful defending from Derrick Luckassen saw the centre-back hack an attempted clearance into his own net.
Their lead was doubled five minutes before the break thanks to a powerful finish from Anass Achahbar, while Elvis Manu scored a vital goal on the stroke of half time when he pounced in the box to head home.
Manu then sealed his side's victory on the hour by slotting in the rebound after Esteban Alvarado had saved an initial effort.
The hosts pulled a goal back late on when Sven van Beek's back-pass caught out goalkeeper Kenneth Vermeer, though it was not enough to stop them slipping to a third league defeat in four matches.
