In the 20th minute, Gothenburg goalkeeper Giannis Anestis passed the ball straight to the away team's striker Aron Johannsson who coldly chipped in the lead goal.
The full hit was Johannsson's third in two matches.
Hammarby continued to offer a nice offensive, but Blåvitt should have had a draw just before the break.
Bajen plays well offensively
bojanic has pain
Blåvitt's Christian Kouakou had a goal ruled out for offside just before the break, but after seeing the replay pictures, it could be stated that it probably should have been approved.
- The last quarter we do what we said we would do.
It is sad that we get a goal ruled out incorrectly, Tobias Sana told DPlay during the half-time break.
Gothenburg had another ball in goal through Alexander Farnerud, but it was also ruled out and that time it seemed to be correct.
2-0 came with 20 minutes left through the star Muamer Tankovic who distinctly banked the ball behind Anestis.
At 3-0, Anestis could have acted better again.
Then a lone Tankovic fired a shot from long range and the ball went in behind the Greek.
Gustav Ludwigson passed to Tankovic's first two goals and it was also he who played until Tankovic's third goal who came with three minutes left to play.
- It is very tough of course.
We did not reach the level we had hoped for at all, says Jakob Johansson to DPlay.
IFK Gothenburg, who recently fired Poya Asbaghi and who are currently temporarily led by Ferran Sibila and Alf Westerberg, have thus not won in 14 matches.
They have 17 points, as many as Helsingborg who are in the qualifiers.