The first meeting between the teams ended 1-1 after a late equalizer by Rosengård's Olivia Holst.
Ahead of the decisive return match tonight, German star Rebecca Knaak is hopeful.
- The first meeting was not our best match, but it was a good result for the return.
We know we have the potential and strength to beat Brann, she tells SVT Sport.
How important is tonight's game?
- It's a very important match, it's our big goal to get to the group stage.
Both as a club, but also each individual player's big goal.
- It's the biggest stage, the biggest you can get to.
Especially when you see the development of the Champions League.
As a player, you want to play against the best teams.
"Very important for Swedish football"
Last year's CL qualification was a miscalculation for the club as they fell by a total of 6-3 against Hoffenheim and thus missed the group stage.
This season, promotion is perhaps more important than before.
Sweden is currently fifth in Uefa's national ranking, which means that teams 1-3 in the women's league get to qualify for the Champions League.
But several European leagues threaten behind, and if the women's league were to drop to seventh place in the ranking, the third-placed team would be without a qualifying game.
- Our goal was to go to the group stage last year.
We didn't solve that, of course we want to do it this year.
It is very important for Swedish football that we continue to be a competitive league.
Therefore, I hope that both we and Häcken manage to get there.
An advancement to the Champions League group stage gives the club 4.3 million kroner.
- It is an important part, but I highlight the sport every day of the week.
Sporting comes first.
We should be there, with the squad and history we have as an association, says Sjögran.