Canadian fans booed the American national anthem when the teams met in a round-robin match in Montreal, which was followed by three fights in the first nine seconds of the game.

The result was the culmination of a midseason tournament that featured stars from Canada, Finland, Sweden and the United States — and a surprisingly political atmosphere.

Connor McDavid scored at 8:18 of overtime to give Canada a 3-2 victory over the United States on Thursday night as the North American rivals turned what had been a tune-up for the 2026 Olympics into a geopolitical brawl over anthems and annexation as much as international hockey supremacy.