Hammarby had heavy minutes at the end of the first half.
Richard Magyar was forced to break the game after a collision, David Fällman jumped in. A few minutes later, Rasmus Alm pushed in 1-0 to Elfsborg from close range.
Then it was half time.
Two quick goals by BajenIn the second half, the Hammarby team turned two goals in five minutes.
Paulinho tied 1-1 in the 66th minute and in the 70th minute Alexander Kacaniklic pushed in 2-1 to Bajen.
Then Hammarby looked to go towards three points.
But Boråsklubben got the last word on Wednesday night. Elfsborg saved a point with a self goal which gave 2-2.
Both Elfsborg and Bajen are on four points after two matches.