It was initially an even match where Djurgården's goalkeeper Jakob Widell Zetterström had to struggle.
Sirius got the first qualified chance of the match when Christian Kouakou was released in the 25th minute.
Zetterström rushed out and managed to solve the dangers that time.
In the 30th minute, it turned instead in the other direction.
Djurgården's Nicklas Bärkroth snorted a free kick that the cage keeper in Sirius David Mitov Nilsson had to act.
Still speechless.
Five minutes later it was close for Kouakou - again.
The Sirius player got a cannon position after a pass from Yukiya Sugita, but Zetterström stood for a new parade.
Zeidans cannon shot
In the second half, one of this summer's new acquisitions would hit.
Moustafa Zeidan, who joined Sirius, had to score his first Allsvenskan goal - and it came in the 7th minute of the match. behind Zetterström.
Djurgården was then close to equalizing in the final minutes.
In the final minutes, the guests found their way into the penalty area and got away with two finishes that were blocked.
The tangled situation was eventually resolved by Sirius.
And Djurgården did not manage to break the deadlock.
Sirius will receive Östersund in the next round.
Djurgården plays the Stockholm derby against Hammarby.