On Thursday, Häcken's European dreams disappeared when Scottish Aberdeen became the number too big over two meetings.
In the league, things have gone all the better for Hisingslaget, but against Djurgården came the first Allsvenskan loss in 80 days, with the summer break included.
The first half was goalless, despite a game and chance advantage over the Stockholm team.
Three minutes into the second, however, the dividend came.
After a failed clearance from Tobias Carlsson, Djurgården kept the pressure.
And it was a double accident for Häckenförsvararen, when he seconds later steered Aslak Fonn Witry's shot into his own goal cage.
But the Norwegian joy was quickly replaced by sorrow.
The outer back threw himself to prevent a deep lead pass.
The pass was prevented, but instead the ball looked behind Jacob Widell Zetterström in Djurgården's goal.
But it was Djurgården who would have the last word.
After a tangled situation in the offensive penalty area, Jacob Une Larsson slammed in the 2-1 goal, seven minutes after Witry's own goal.
Häcken chased an equalizer and Widell Zetterström was forced to a save on the goal line before referee Glenn Nyberg blew off.
Thus, Djurgården tops the Allsvenskan, one point ahead of Malmö.