Giants defender Sam Reid has been handed a two-game suspension for his bump on Fremantle skipper Nat Fyfe.

Fyfe is now set to miss his side's Round 3 clash against Carlton due to concussion, with Reid charged for rough conduct.

Fyfe was subbed out of Sunday's 31-point win over the Giants in the third quarter after copping the high bump from Reid.

Speaking post-match, Dockers coach Justin Longmuir all but ruled him out for the Blues contest.

"He got concussed and we subbed him out. He's good in the changerooms now, he's up and about," Longmire told reporters.

"He's getting around his teammates. We subbed him out of the game. What that means for the next couple of weeks, I'm not sure.

"We tread carefully with all concussions, and he won't be passed fit to play before he ticks every box with our doctors. That's the same with every player."

Under the AFL's new protocols, players who suffer concussions enter a mandatory 12-day period where they are unable to play.

It is a big blow for the Dockers ahead of a crucial clash against Carlton at Marvel Stadium on Sunday - with the dual Brownlow medallist still his side's most important player.

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Longmuir's side went down to the Demons at the MCG in Round 1 but evened their record in a comfortable home victory last night.

They meet a Carlton side who will undoubtedly be desperate to win after slumping to a ninth-straight 0-2 start to the season.

The Dockers and Blues meet at Marvel Stadium on Sunday at 3.20pm AEDT.