The Vegas defenseman suffered a right wrist injury in the second period after being slammed into the glass by Adrian Kempe.

Heavily favored Canada thwarted Sweden's late rally on Wednesday night, opening the Four Nations Face-Off with an exhilarating 4-3 victory.

Mitch Marner's goal at 6:06 of overtime helped Canada escape with a win.

Two Golden Knights saw action while a third - goalie Adin Hill - sat the opener as Jordan Binnington got the nod for Canada and made 23 saves.

Vegas captain Mark Stone scored a goal and defenseman Shea Theodore left the game with an injury and did not return.

The United States - with Vegas' Jack Eichel and Noah Hanifin - faces Finland on Thursday night.

Here are three takeaways from Wednesday's game:

UPDATE ON SHEA: Canada coach Jon Cooper announced Theodore will miss the rest of the tournament. Theodore suffered a right wrist injury in the second period after being slammed into the glass by Adrian Kempe. Theodore, writhing in pain, received immediate medical attention on the bench before heading down the tunnel for X-rays. Each team was allowed to bring seven defensemen, which means Travis Sanheim will enter the lineup after being a healthy scratch against Sweden.

"That's a big blow," Cooper said. "It's heartbreaking for the kid. He was the first one there at the door hugging everybody that came off. That's a tough one to swallow because you know how much it means."

STONE ON SID: Though Stone's goal gave Canada a two-goal lead in the second period, he was much more complimentary of teammate Sidney Crosby. Stone started the rush by poking the puck loose from William Nylander and feeding Crosby, who immediately raced down the right side of the ice. Crosby protected the puck while waiting for the moment to feed Stone, who one-timed it past Filip Gustavsson.

"This is the first time I've actually been able to get to play on a team with him, it's special, man," Stone said of Crosby. "The way he goes about his business, the way he can calm a bench down. Has that presence. Still playing at a crazy high level. I don't see him slowing down anytime soon."

HILL'S TURN?: After Binnington allowed Sweden to get back in the game with two third-period goals and force overtime, there's a good chance the Golden Knights starting netminder could start between the pipes on Saturday. Binnington looked sharp in overtime, making a couple of big saves, but Hill's history of stepping up in the postseason could prove beneficial. Hill has a record of 12-6 and a 2.09 goals-against average to go along with a .932 save percentage and three shutouts in the postseason.