Joel Armia had two goals and an assist to lead Finland to a 4-1 win over the United States in a Pool B preliminary-round game Wednesday at the world junior hockey championship.
The Americans are considered one of the tournament favorites.
But Finland and the U.S. are both 1-1 in Pool B with Canada (1-0) facing the Czech Republic (1-0) later on Wednesday.
Armia, a first-round draft pick of the Buffalo Sabres, paced the Finland offense. Mikael Granlund, another first-round selection of the Minnesota Wild, and Nashville Predators prospect Mikka Salomaki also scored.
Brandon Saad of the U.S. tied the game early in the second period, but Armia's first goal at 10:53 of the third period put the Finns ahead again.
Sami Aittokallio made 38 saves on 39 shots in Finland's net for the win. John Gibson allowed four goals on 27 shots for the United States.