Alkmaar, Netherlands (My Sportsbook) - Mounir El Hamdaoui increased his Dutch- leading scoring total to 18, helping AZ win its 11th straight while extending its unbeaten streak to 20 with a 3-1 win over Willem II on Saturday.

Hamdaoui, who holds a four-goal edge in the scoring race, capped the impressive win at Almaarderhout. Moussa Dembele and Maarten Martens also scored for AZ, which fell behind in the 18th minute.

AZ hasn't lost since Sept. 13, when it dropped its second straight to open the Dutch Eredivisie season. Since, AZ has posted an 18-0-2 record.

Willem II hopes to be able to pull off an upset after Said Boutahar handed his club the lead in the 18th, but Dembele and Martens scored before halftime and Hamdaoui sealed the win in the 62nd minute.

AZ opened its lead atop the league to 12 points over idle Twente, while idle Ajax is now 14 back.

Also Saturday, Goran Popov, Arnar Smarason and Viktor Elm scored as Heerenveen posted a 3-1 win over NAC to remain with 15 of the top spot, Rydell Poepon had the winner in the 80th as Sparta beat 10-man Roda 1-0, and Vojtech Schulmeister scored in the 83rd to earn Heracles a 1-1 tie against NEC.

On Sunday, Graafschap hosts Twente, Vitesse hosts Ajax, Volendam hosts PSV Eindhoven, Utrecht hosts Den Haag and Feyenoord hosts Groningen.