Temwa Chawinga registered the winner for Kvarnsveden in their 1-0 win over Umea in the Swedish Elitettan League on Saturday.
The hosts were hoping to extend their unbeaten run to five games, following their 6-1 win over Sundsvall last week.
On the part of the visitors, they aimed to make it nine successive games without a defeat and open up a six-point gap at the top.
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However, Chawinga's goal just six minutes into the game was all Fredrik Bengtsson's side required to secure the victory over Umea at Ljungbergsplanen.
Nigeria's Ebere Orji came close twice before being replaced by Burundi's Zabibu Nduwimana in the 79th minute, but they could not help the leaders avoid the third defeat of the season.