Yartapuulti has got out of jail with a one-point win over the GIANTS to secure a home AFLW elimination final.
Gemma Houghton's massive mark and goal with less than a minute left gave Port the lead for the first time on Sunday at Alberton Oval and they won 7.1 (43) to 6.6 (42).
Had Port lost, they would have been on the road next weekend in their first finals series to play Fremantle in one of the knockout matches.
Instead, the win in front of a boisterous home crowd of more than 4000 means they will host Richmond in their elimination final.
It was a brutal end to the season for the GIANTS, whose losing streak extended to eight games.
They were outstanding for much of the match, but the experience of Power veteran Kirsty Lamb was critical when the game was on the line.
Lamb snapped the opening goal of the final term and then her pass found Houghton, who marked and kicked the match winner.
Adding to the tough day for the GIANTS, Meghan Gaffney suffered a right knee injury having just returned this season from an ACL rupture.
The GIANTS have averaged 70 tackles per game this season, but on Sunday they had a whopping 106 to 80.
Captain Bec Beeson was mighty, kicking her side's only goal in the last term and amassing a game-high 25 disposals in her best-afield performance.
She stayed on the ground in the frenetic last quarter despite a head knock.
Port's Maria Moloney was critical with her 17 disposals, including 13 contested possessions.
Port suffered a double blow pre-game when ruck Matilda Scholz (calf) and midfielder Abbey Dowrick (soreness) were late withdrawals.
The GIANTS piled on the pressure from the start and were rewarded when Eilish O'Dowd kicked the opening goal after three minutes.
They held a game-high lead of 17 points in the third term, but Port kept with them and kicked three goals to one in the last quarter.
YARTAPUULTI 1.1 3.1 4.1 7.1 (43)
GIANTS 2.2 4.4 5.6 6.6 (42)
GOALS
Yartapuulti: Wendland 2, Mules-Robinson, Keryk, Lamb, Saint, Houghton
GIANTS: O'Dowd, Evans, Garnett, Goldsworthy, Mowbray, Beeson
BEST
Yartapuulti: Wendland, Saint, Moloney
GIANTS: Evans, Beeson, Mowbray
INJURIES
Yartapuulti: Syme
GIANTS: Gaffney
LATE CHANGES
Yartapuulti: Matilda Scholz and Abbey Dowrick replaced in the selected side by Ange Foley and Maddy Keryk
Reports: Nil
Crowd: 4,148 at Alberton Oval
