Armadale and Cockburn City will represent WA in the national Round of 32 stage of the Australia Cup following Tuesday night's WA preliminary semi-finals.
The two sides will also contest the 2022 State Cup final on Sunday 24 July.
Armadale earned themselves a potential crack at an A-Leagues Men side with a 4-1 victory over Bayswater City.
Cockburn put themselves in the same position by winning 3-1 away to Sorrento after extra-time.
At Alfred Skeet Reserve, an early goal from Armadale's Tarek Atta was cancelled out before the break thanks to the predatory instincts of Gordon Smith. But that was as good as it got for Baysie, who had no answer to Armadale's second-half display.
Pieter Jacobsz nodded Armadale back in front, then Baysie were reduced to 10 men as Jason Mirco collected a second yellow card.
Armadale took full advantage with Angel Andres Rivera slotting home a penalty, before Gordon Perkins added the finishing touch in stoppage time.
Now not only do Armadale have the another possible trip over east in the offing - they went to Cairns in this competition four years ago - but they will also play in the State Cup final against Cockburn next month.
That should be a special game in particular for Armadale defender Nathan Costello, who missed the club's 2018 State Cup final win over Gwelup Croatia because of a pre-planned holiday.
HIGHLIGHTS: Armadale SC 4-1 Bayswater City
Cockburn advanced to the Round of 32 and a place in the State Cup final after coming out on top in a highly entertaining Preliminary semi-final at Sorrento.
The Cockerels were worth their half-time lead, given to them when Daniel Santich finished some smart interplay.
But Sorrento came out a different side after the break and deservedly levelled through Tim Hill. They then put the Cockburn goal under heavy pressure, but found City keeper Michael Craggs in top form and the tie went into extra-time.
And it was the visitors who took their chance with goals early in both halves of the extra period.
First Harry O'Brien produced a fantastic finish from the edge of the box to restore Cockburn's lead. Then another substitute, Ivan Skorich, punished an underhit back-pass to set up a State Cup final clash against Armadale.
HIGHLIGHTS: Sorrento 1-3 Cockburn City
