Erik Falkenburg and Bjorn Johnsen each scored twice as ADO Den Haag stormed to a convincing 4-0 win over fourth-placed PEC Zwolle in the Dutch Eredivisie on Friday night.The visitors went into the game on the back of a six-match unbeaten run but proved no match for their mid-table opponents.Falkenburg put Den Haag in front after 23 minutes and Johnsen grabbed his first of the night when he doubled his side's lead on the stroke of half-time.Falkenburg netted again early in the second half and Johnsen's second on the hour sealed the home side's emphatic win.ends