Canada captain Sidney Crosby, right, hoists the trophy after defeating the United States following an overtime period of the 4 Nations Face-Off championship hockey game in Boston.

United States players watch Canada celebrate after an overtime loss following the 4 Nations Face-Off championship hockey game in Boston.

Canada's Connor McDavid (97) celebrates after his game-winning goal against the United States during an overtime period of the 4 Nations Face-Off championship hockey game in Boston.

United States' Brady Tkachuk, right, celebrates after his goal against Canada with his brother Matthew Tkachuk, left, during the first period of the 4 Nations Face-Off championship hockey game in Boston.

United States' Jake Sanderson (85) is congratulated after his goal against Canada during the second period of the 4 Nations Face-Off championship hockey game in Boston.

United States' Brady Tkachuk, right, celebrates after his goal against Canada during the first period of the 4 Nations Face-Off championship hockey game in Boston.

United States' Adam Fox, left, battles Canada's Mitch Marner for the puck during the first period of the 4 Nations Face-Off championship hockey game in Boston.

Canada players celebrate after a goal by Nathan MacKinnon during the first period of the 4 Nations Face-Off championship hockey game against the United States in Boston.

United States goalie Connor Hellebuyck, left, gives up a goal to Canada's Nathan MacKinnon, as Canada's Sidney Crosby (87) looks on, during the first period of the 4 Nations Face-Off championship hockey game in Boston.