Antonia Edmondson (18), Lisa Wallbutton (15) and Emma Lobb (12) were the Tigers’ top scorers.
The Tigers, ranked eighth on the ladder, will take on top team Rockingham.
The Willetton men missed a spot in the finals.
PerthNow Digital Edition.
Your local paper, whenever you want it.Get in front of tomorrow's news for FREE
Journalism for the curious Australian across politics, business, culture and opinion.
READ NOWThey finished the home-and-away season with a 25-point loss to the Redbacks.