Brett Holman admits Brisbane should have put Perth to bed and strengthened their grip on the A-League's third slot.
Yet he's determined to make amends in the last round by defeating Wellington to supplant Melbourne City and earn another crack at Asian Champions League football.
A flat Roar outfit spurned a golden chance against the Glory on Saturday night, going down 3-1 in the west and allowing City to sneak ahead on goal difference.
It came as coach John Aloisi rested key players Thomas Broich, Thomas Kristensen, Avraam Papadopoulos and Michael Theo with an eye to Wednesday's home ACL clash with Japanese outfit Kashima Antlers.
"We're definitely disappointed," said Holman, who netted Brisbane's sole goal off a deflection.
"Obviously we missed a couple of boys but the amount of chances we had we should have put them to bed.
"Especially the way we've played against them this year -- both times we were dominant."
In the worst-case scenario, fifth-placed Perth can throw Brisbane out of the four and deny them a home elimination final if they overturn a six-goal difference.
But final-round fixtures favour the Roar, who play the Phoenix at home while City travel to take on Kenny Lowe's side.
Should they win and City lose or draw, third will be theirs, not to mention the prospect of erasing a one-goal difference should the pair end up on equal points.
There's also added motivation for Holman as the marquee midfielder readies for "the last bite of the ACL cherry," a final chance to claim a first victory from the bottom of Group E.
"That's going to be a big thing for us against Wellington, to see if we can [make] the Asian Champions League again -- the qualifying round anyway," he said.
"We can learn from what we've experienced this season, take it into next season and have another crack at it.
"We've had some bad results in the ACL this campaign.
"But we're still in it mathematically and we're not going to give up until that's out of reach."