The Wanderers are into a second consecutive Grand Final thanks to a goal and assist from Youssouf Hersi.
Besart Berisha scored against his future side to take Brisbane into a third Grand Final in four years.
The two most successful sides in the A-League’s history meet for the first time ever in a finals match.
Only one of last year’s grand finalists will return to this year’s Championship match.
The Mariners emerged victorious in a tight match low on chances.
The defending champions host Josep Gombau’s Adelaide in an exciting preliminary final.
Guilherme Finkler scored right at the last to send Melbourne Victory through to the penultimate round of finals football.
For the fourth time this season, interstate rivals Melbourne Victory and Sydney FC face off for a place in the penultimate round of the finals series, competing in a knockout-tie for the first time since the 2010 Grand Final.
Central Coast’s two first half goals meant they leapfrogged Melbourne Victory into third place.
The Wanderers came from behind to secure a second place finish on the ladder.