Kofi was substituted in the 38th minute of the Yellow and Blacks pre-season 1-1 friendly draw against Russian side Rostov on Saturday.
The 29-year-old midfielder landed badly on the ground after jumping to win a header against a Rostov player.
He received treatment on the field but it appeared to have suffered a thigh injury.
The extent of the injury is not yet know but reports indicate that the former Club Brugge enforcer will be sidelined for a couple of weeks.
AIK will kick-start their Swedish Cup campaign against Jönköpings Södra IF on February 23. Read Full Story
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