Borås team Elfsborg went straight in the group game with three straight victories and advanced to the quarterfinals, where Gothenburg was the opposition.
Visiting Blåvitt initially got it tough at the same time as match hero Jacob Ondrejka got off to a flying start.
Early in the match, the youngster had a finish on goal that forced Gothenburg goalkeeper Warner Hahn to a rescue.
Ondrejka would have better luck in the second half.
After just over an hour of play, he pulled away to the left, broke into the track and fired a powerful finish that this time found its way behind Hahn.
The Elfsborg player celebrated by putting his finger to his mouth and hugging the Blue and White supporters.
The goal then became the only match - which means that Elfsborg is now ready for the semifinals.