Hammarby got the first big chance of the match when away goalkeeper Tim Rönning hit a weak pass that Astrit Selmani almost steered into goal, but defender Maudo Jarjué cleared the ball on the goal line.
Jarjué then had to leave the match after a head injury he sustained in connection with the situation.
Elfsborg took the lead in the 26th minute of the match through Rasmus Alm.
After a ball loss by Hammarby in midfield, Elfsborg countered at full speed.
Per Frick got the ball and passed it on to a running Alm who skillfully placed 1-0.
After the goal, two teams went on the offensive but Elfsborg went into the halftime break with a 1-0 lead.
- We have many good opportunities to adjust, then it's that little last thing that is missing, says goal scorer Rasmus Alm to Discovery +.
The match is in progress