Even without NHL professionals in the Olympics, the ice hockey meeting between Canada and the USA is a match between two big rivals and this time the "little brother" won the USA.
It was certainly Canada that took the lead after only one and a half minutes in the heavyweight meeting.
But the USA replicated quickly and also made it 2-1 just before the end of the first period.
The Americans then went up to 3-1 before Canada reduced to 2-3 with five minutes left of the second act.
Six minutes into the third period, the decision came when Kenny Agostino made it 4-2 for the USA.
Skellefteå goalkeeper Strauss Mann saved 35 of the 37 Canadian shots.
In the premiere against China, he sat in the stands.
The USA tops the group with six points after two matches, Canada is second with three sticks.
Germany and China both stand at zero points after a round played.