Thomas Thomasberg and FC Midtjylland went into the game knowing they were without a win in Farum for five years and despite the enormous importance of the match, the reigning Danish champions apparently had not learned their lesson as they went behind after just two minutes.
Peter Ankersen broke through on the right and squared the the ball into the box where Benjamin Nygren, who is likely to leave FC Nordsjaelland this summer, controlled the ball and cooly slotted the ball past the reach of Jonas Lossl from a tight angle.
The home side were in total control during the opening 20 minutes and could easily have added to their lead but FC Midtjylland gradually worked themselves back into the tie and restored parity, when Polish international Adam Buksa steered a powerful header into the net.
FC Midtjylland began the second half in a more composed manner and were unfortunate to see Oliver Sorensen's stinging drive saved by the wood work shortly after the interval. And instead the home side regained the lead, when Ousmane Diao under severe pressure poked the ball into his own net after 66 minutes.
Bad then turned to worse for Diao ten minutes before the end, when he brought down Walle Egeli in the box for his second bookable offence while Egeli converted the penalty.
Valdemar Byskov gave the visitors a lifeline with a superb goal on a direct free-kick three minutes from the end but it was too little too late for FC Midtjylland who lost a vital step in the race for the Danish title.