Ricardo Santos fired the winner four minutes from time as Allsvenskan champions Kalmar beat leaders Gothenburg 2-1.
Kalmar were ahead in just the ninth minute through Abiola Dauda, but Hannes Stiller's leveller in the 76th minute seemed to have earned Gothenburg a point until Santos struck.
The result takes Kalmar third while Gothenburg remain top, although AIK will displace them if they avoid defeat against Djurgarden on Monday.
