AaB closed the deficit behind out-of-sorts Superliga leader FC Midtjylland to three points with a 2-0 home win over Sonderjyske.
AaB is now within touching distance of Midtjylland, which has failed to win in its past five league games.
FC Copenhagen saw its mini-revival slowed by a 1-1 draw at lowly Randers.
The champion, sitting in mid-table, had won its past two but had to rely on a
Fourth-placed Odense was held to a goalless home draw by Brondby.