ALKMAAR, Netherlands: Arsene Wenger insists his "naive" Arsenal stars must learn from the frustration of conceding a last-gasp equalizer against AZ Alkmaar.

Wenger's side was on the verge of a third successive win in Group H after Cesc Fabregas's first-half strike put it ahead at the DSB Stadium.

But the Dutch champions - who had the worst possible preparation for the match when their owner's bank was declared bankrupt on Monday - punished Arsenal for a lackluster second half display as the Gunners' poor marking at a free-kick allowed David Mendes Da Silva to lash in the stoppage time goal that secured a 1-1 draw.