Washington Capitals defenceman Tom Poti will miss Game 7 against the Montreal Canadiens after getting hit in the eye by a puck.

Coach Bruce Boudreau said Tuesday that Poti has "a pretty significant injury" and could be sidelined two to three weeks — or longer — if the Capitals stay in the playoffs by winning Wednesday night's deciding game of their first-round series.

Poti was hurt late in Montreal's 4-1 home victory in Game 6 on Monday night.

Poti is tied for the team lead with four assists this post-season, and he and rookie John Carlson have formed Washington's top defensive pairing against Montreal.

It appears Karl Alzner could get the call in his stead. The former Canadian world junior played 21 games this season for Washington and was recalled Tuesday from the American Hockey League.

Other possible replacements include Tyler Sloan, who played limited minutes in Games 4 and 5 but was passed over on Monday for Shaone Morrisonn, or hard-hitting John Erskine, who hasn't played since April 6.

Boudreau also said he has decided on a goalie for Game 7, but he wouldn't announce a starter.