Collingwood has backed itself to overcome travel, quarantine, a hostile away crowd and a poor recent record against West Coast to claim an upset win in its elimination final clash on Saturday.

But the Magpies are still weighing up their best 22 for the Optus Stadium clash, with question marks hanging over forward Jaidyn Stephenson and the return of veteran midfielder Chris Mayne. 

The Pies will have served a seven-day stint in Perth under the state's strict border rules before they take the field in the knockout final. 

However coach Nathan Buckley is confident his side can break a run of five losses from their past six encounters with the Eagles, including a 66-point drubbing earlier this season. 

"The underdog status is external to us. We've got a great belief we can go out and perform, execute and win the game of footy," Buckley said on Thursday. 

"At various times the external opinion will support the way you see yourselves and other times it won't. But at this point all we can concentrate on is what we're bringing to the table. 

"We understand we're coming up against a side that the last time we met them we fell a long way short of. They played as good a footy as we faced in 2020 in that game in round eight and we've got to turn the tables on that."

Buckley couldn't guarantee Stephenson's place in the side after the forward's patchy form in recent weeks, with the 2018 NAB AFL Rising Star winner returning to the side in round 18 and managing a goal from eight disposals.

Mayne will be available for the first final after being cleared from his cheekbone fracture in round 14. 

"We have our final training session tonight and that will have no small part of the final decisions that will be made for our finals side," Buckley said.