AMSTERDAM, Nov 9 (Reuters) - Dutch Cup holders Ajax Amsterdam scored a goal in each half to sink ADO Den Haag on Thursday and cruise into the last 16, while PSV Eindhoven joined them after a 4-0 win at Vitesse Arnhem.
Ajax central defender Jaap Stam opened the scoring after seven minutes and Klaas-Jan Huntelaar settled the match 20 minutes into the second half.
PSV coach Ronald Koeman rested Phillip Cocu for the Arnhem game as PSV travel to Ajax on Sunday but they did not need him with Arouna Kone and Jason Culina netting in the first 25 minutes.
Jefferson Farfan added a third 12 minutes before time and Timmy Simons converted a penalty to complete the rout.
Utrecht hit five to eliminate the amateurs of Rijnburgse Boys, while the reserves of AZ Alkmaar thrashed amateur side Genemuiden 8-1 for a spot in the next round.
On Wednesday RKC Waalwijk stunned Feyenoord with a 3-2 extra time win and Alkmaar's first team thumped Meerssen 10-1.