Sydney have upset Geelong in a bruising AFLW encounter to set up a preliminary final showdown with back-to-back reigning premiers North Melbourne.
The unfancied Swans turned up the pressure in the semi-final to defeat the Cats by 8.2 (50) to 7.5 (47) at GMHBA Stadium on Saturday.
Young ruck Maddie Quinn (22 disposals, 18 hit-outs, one goal), ball-winner Zippy Fish (25 disposals) and superstar Chloe Molloy (three goals, 15 disposals) were instrumental in the three-point win.
"That game was just amazing," 19-year-old Quinn said.
"We just stuck to our system - contest, pressure ... got the job done and so excited for next week.
"Throughout the week I just had one focus which was to be physical in the ruck and that's what I did and everything just came from that."
It marks the Swans' first preliminary final berth after entering the competition in 2022.
Quinn said Sydney "100 per cent" could take it to North Melbourne as the Kangaroos try to clinch a grand final spot in another step to a potential three-peat.
"I don't think we played our best game against them in round eight," Quinn said.
"And so we're ready for the fight and (we'll) just bring what we did today to get the win."
Geelong, on the other hand, bow out of the finals in straight sets after finishing second on the ladder with one loss in the regular season.
Cats ruck Piper Dunlop was stretchered off the ground in the third quarter after a head clash in the middle with Swan Tanya Kennedy.
In a scary moment, Dunlop tried to play on but stumbled and appeared to lose consciousness as a Swans player cushioned her fall to the ground.
Sydney went into the final change with a deserved 10-point lead after Quinn nailed a shot from the boundary.
The Cats looked to be down and out when Cynthia Hamilton (two goals) gave the Swans a 16-point buffer with a goal early in the last quarter.
But they hit back with quick goals from Chloe Scheer and Jacqueline Parry to draw back within a kick.
Scheer had a chance to kick her fourth from about 15m out on a slight angle after a diving mark, but her set shot slammed into the post.
The dying minutes were frantic, with Hamilton clinging on for a pressure-releasing mark outside the Cats forward 50 just before the final siren blew.
