The Group A showdown between the United States and Russia at Bolshoy Ice Dome will have a couple of especially interested spectators: Canada coach Mike Babcock and executive director Steve Yzerman plan to be in attendance.

"You go to see high-level hockey and what the standard is," Babcock told the media Saturday morning.

Canada has the day off before facing Finland, with the winner earning first place in Group B and a bye into the quarterfinals on Wednesday.

SOCHI -- Finland forward Aleksander Barkov left the game against Norway early in the third period Friday with a lower-body injury and did not return.

Finnish coach Erkka Westerlund had no further update on Barkov's condition when he was asked about it following Finland's 6-1 win at Shayba Arena.

Barkov, an 18-year-old rookie with the Florida Panthers, played two shifts in the third period before leaving with a little less than seven minutes remaining in the game. He had no points, three shots on goal and won seven of nine faceoffs in 18 shifts totaling 15:03 of ice time against Norway.

SOCHI -- The United States will try to stifle Russia's skill Saturday with two shut-down defense pairs playing in front of starting goalie Jonathan Quick.

Brooks Orpik and Paul Martin, a regular pair with the Pittsburgh Penguins, skated together in practice Friday and are expected to be together Saturday, when the Americans take on the Russians at Bolshoy Ice Dome in Group A preliminary-round play (7:30 a.m. ET, NBCSN, CBC). Ryan Suter and Ryan McDonagh were the other shut-down pair.

Orpik and Martin are expected to get a lot of ice time against Russia’s top line of Evgeni Malkin, Alex Ovechkin and Alexander Semin. Suter and McDonagh likely will see plenty of Pavel Datsyuk, Ilya Kovalchuk and Alexander Radulov.

Slovakian forward Tomas Marcinko, who sustained a leg injury in his first game for his country in a loss to the United States on Thursday, will not play another game at the 2014 Sochi Olympics.

The International Ice Hockey Federation website reported the news Friday morning.

Marcinko, who sustained torn ligaments, also may miss the remainder of the season for HC Kosice in the Slovak Extraliga, according to team doctor Vladimir Luptak. He had 10 goals and 28 points in 44 games for HC Kosice this season.

SOCHI -- Sweden captain Henrik Zetterberg is out for the rest of the 2014 Sochi Olympics because of injury, the Swedish Ice Hockey Federation announced Friday.

Zetterberg, who has a herniated disk, missed 13 games for the Detroit Red Wings during the NHL season.

Zetterberg had a goal and won seven of 16 faceoffs in 18:14 of ice time Wednesday in Sweden’s 4-2 Olympic-opening win against the Czech Republic. He did not practice Thursday in order to receive treatment.

"In this situation it was no tough decision as this was no borderline case," Sweden team doctor Bjorn Waldeback said Friday. "For people who know medicine, it is obvious that this couldn't continue.

"[Henrik] has been in touch with the Detroit medical staff. I have been in touch with the NHL doctors who are here. They totally agree with us. When you suffer from a herniated disk the way he does, you need to go home for a medical evaluation."

SOCHI -- Finland captain Teemu Selanne is expected to play Friday against Norway (12 p.m. ET; MSNBC, SNET), one day after leaving the game against Austria with a neck injury, coach Erkka Westerlund told the Finnish media.

He skated with Aleksander Barkov and Mikael Granlund on Friday morning.

Selanne played in the first period of Finland's 8-4 win but did not return to play the rest of the game. However, he skated with the team Friday morning and is likely to play against the Norwegians.

Hockey Canada confirmed Friday morning that Matt Duchene and P.K. Subban are in the lineup after being scratched against Norway. Duchene, of the Colorado Avalanche, replaces Patrick Sharp of the Chicago Blackhawks. Montreal Canadiens defenseman Subban goes in for Dan Hamhuis of the Vancouver Canucks.

Canada also scratched Montreal goalie Carey Price, who played Thursday against Norway. Vancouver's Roberto Luongo, the gold medal-winning goalie four years ago, will start against Austria. He will be backed up by Mike Smith of the Phoenix Coyotes.

Sweden captain Henrik Zetterberg did not take part in practice Thursday and missed the team picture due to a herniated disk.

Zetterberg is day-to-day and could still play against Switzerland on Friday (7:30 a.m. ET, NBCSN, TSN), according to Sweden team doctor Bjorn Waldeback.

"We will [make the] decision [Friday] and see how he feels and how he adjusts to anti-inflammatory treatment and rest," Waldeback said.

SOCHI -- Montreal Canadiens defenseman P.K. Subban and Colorado Avalanche center Matt Duchene will have to wait another day to make their Olympic debuts.

Canada coach Mike Babcock said Subban and Duchene will sit out its opening game of the 2014 Sochi Olympics against Norway on Thursday (12 p.m. ET, USA, CBC), but will play Friday against Austria (12 p.m. ET, USA, CBC).

Tampa Bay Lightning right wing Martin St. Louis, who was a late addition to the team when Steven Stamkos was ruled out due to injury, and Vancouver Canucks defenseman Dan Hamhuis will play Thursday, with Hamhuis making his Olympic debut.

Semyon Varlamov of the Colorado Avalanche will start in goal for Russia in its first game of the 2014 Sochi Olympics against Slovenia on Thursday (7:30 a.m. ET, MSNBC, CBC), according to a tweet from the IIHF.

Sergei Bobrovsky of the Columbus Blue Jackets will serve as his backup.