Collingwood are bracing to be without two key forwards for next week's matchup with the Western Bulldogs following multiple setbacks in Friday's draw with Fremantle.

Already without Jamie Elliott (vascular), Will Hoskin-Elliott (hamstring) and Reef McInnes (concussion) for this week's trip to Perth, the Magpies could be further undermanned in the coming weeks.

Ruck-forward Mason Cox has entered concussion protocols and could be facing an extended period on the sidelines with a knee issue, while Brody Mihocek is suspected to have damaged his hamstring.

Mihocek only just returned to Craig McRae's side for his first game since Round 8 due to a hamstring strain, with there now fears the five-time club leading goalkicker is set to have another spell on the sidelines.

"Mason's got concussion, and his knee twisted underneath him and he might have some bone bruising too," McRae said post-game.

"We'll have to wait and see on that.

"Brody's got signs of a hamstring awareness/strain/back stuff, I'm not sure. We'll work through that. The same one (he recently strained).

"In the last quarter we didn't have any key forwards. We were fighting and scrapping, and I'm really proud of that. 

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"We'd like to walk away with a couple more points, but it's not through a lack of effort."

The Magpies are likely to regain McInnes for next week's clash with the Bulldogs as at least Cox makes way, while the return of Elliott is not yet clear.

Hoskin-Elliott is unlikely to be cleared to play by Round 12 and could return the following week against Melbourne for Collingwood's King's Birthday game.

Veteran Jeremy Howe is nearing a return from a groin injury and could be used forward if fit, while Ash Johnson should be available after plying his trade in the VFL in recent weeks.

The Magpies host the Bulldogs at Marvel Stadium on Friday as they look to extend their unbeaten run to nine matches.