FC Nordsjaelland missed the chance to join the leaders in the SAS-Ligaen as they opened the scoring and then fell behind in a wild eight minutes at Farum Park.
Nordsjaelland went 1-0 up against Sonderjyske in the 67th minute when Matti Lund Nielsen found the net, but Anders Ostli then levelled just two minutes later. And the visitors were ahead in the 74th minute when Soren Frederiksen struck what proved to be the winner.
Stryger Larsen and Mike Jensen struck four minutes apart in the 29th and 33rd minute as Brondby won 2-0 at AaB, although the gloss was taken off the victory by the last-minute dismissal of substitute Ousman Jallow for a second bookable offence.
Kim Aabech's 28th-minute penalty was enough for Lyngby to beat AC Horsens 1-0. Horsens were reduced to 10 men as Martin Spelmann saw red for conceding the spot-kick.