ROTTERDAM - Champions AZ Alkmaar beat Sparta Rotterdam 2-0 in the Dutch league on Friday after losing their opening fixture at Heracles Almelo. Belgium striker Moussa Dembele opened the scoring for Alkmaar after six minutes when he netted a pass from last year's Dutch league top scorer Mounir El Hamdaoui. Alkmaar were still not at their best and missed several chances but after 64 minutes captain Stijn Schaars set up El Hamdaoui to double their lead and seal the victory. In Friday's other match, NEC Nijmegen also registered their first win of the season by beating Heerenveen 4-1 with a double from Bjorn Vleminckx who scored the first and last goals. Martin Jol's Ajax Amsterdam side host RKC Waalwijk on Saturday while PSV Eindhoven visit Steve McClaren's Twente Enschede on Sunday when Vitesse Arnhem welcome Feyenoord.