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.

Canada’s men’s hockey team defeated the USA 3-2 in overtime Thursday to capture the inaugural 4 Nations Face-Off Championship as the NHL put on a show in the first edition of this midseason international tournament.