Oliver Valstrom (New York) and Alexander Chmelevsky (San Jose Sharks) scored for the United States, eliminating Russia for the third consecutive year (semifinals in 2017, the quarterfinals in 2018) and will play Finland, a semi-final winner of 6-1 against Switzerland, on Saturday (20:00 ET, NHLN, TSN).
"It's a pretty emotional tournament and obviously one such game is quite emotional, so you just do not try to get too high, you do not try to get too low," Primau said. "The goal is gold, so we are not done yet. The battle is still there, so it's an honor and this is something special with this group."
The United States is on 8-1-0-12 against Russia at the tournament.
Grigori Denisenko (Florida Panthers) scored and Petar Kochetkov made 25 saves for Russia, which lost for the first time in six tournament matches and will play a Finnish / Swiss bronze medal winner.
"It's a big disappointment, but it's a new day [Saturday], a new game, "said Russia through Kirill Slepet through an interpreter." Our team is one of the best here. We were a little unhappy. We will fight for (bronze) medal. "
It seems that Denisenko gave Russia a lead of 1-0 at 12:13 from the first period, but a video review finds that he has redirected the pack into the net with his skate, which is not allowed under the rules of the IIHF.
Walstrom gave the United States a 1-0 lead at 14:29 from the first with a timer from the right lap of a break from Logan Coqueryl (islands).
Chmelevski scored with 2: 0 with the power of the transitional deadline of Jack Hughes (2019 NHL), at 4:20 of the second period.
"In the end, there were a bit of nervous heavy attacks and it's really difficult for them to compete because they have a very high skill," Hughes said. "It was nice to win the victory. We need to have the same effort [Saturday]. "
Denisenko cut him 2-1 at 13:36 from low in the right round of the shot that beat Papaou (Montreal Canadiens) over the left shoulder.
Russia forward Clim Kostin (St. Louis Blues) almost tied the game 1:12 in the third period, when his blow to power played a milestone behind Primau, but US defense Philip Kemp (Edmonton Eulers) cleared the pack with a stick just before crossing goal line.
"I saw a man shot and then hit the prime minister and I'm ever lost if for a little while," Kemp said. "Then I saw him falling, and I knew that I had to beat the stick of that man who was in the crease, so I just tried to get a low position and dig it.
"To be honest, I did not think really, it was just an instinct. I do not know if it was from practice, muscle memory, or not only to dig them to the crease, it was a huge game for us."
Primau made 15 savings in the third period to save the lead.
"He has given us comfort when he needs it," said US coach Mike Hastings. "When you play a team that is good as Russia, they will get the odds and you need the last line of defense to be there for you, to give you time to catch your breath at times."
Russia entered the 5-for-16 match (31.3 percent), but left for 0 against the United States, which has the highest penalty killing of the tournament (12-for-13, 92.3 percent).
"Your best penalty killer should be your goalkeeper, and [Primeau] was [Friday]Hastings said.
Video: The United States is moving towards the gold medal after defeating Russia
Finland 6, Switzerland 1
Aarne Talvitie (New Jersey Devils) scored two goals, while Aleski Heponiemi (Florida Panthers) had one goal and three assists to help Finland defeat Switzerland 6-1 in the 2019 semi-finals of the IIHF World Junior Championship in the Rogers Arena in Friday.
Finland will play USA on Saturday for the championship.
"Of course they are favorites, but I think we have a good chance if we fight and we are guys who control the puck," said Finnish coach Yusi Akhokas. "We played better and better after each game."
Rasmus Cupri (Los Angeles Kings) had two goals, Jesse Jolon (Montreal Canadiens) and Henri Jokhiharu (Chicago Blackhawks), and Uco-Peka Luckonne (Buffalo Sabers) made 16 savings for Finland, which surpassed Switzerland 33-17.
"We have had several goals straight from the start, so we have confidence to play through the game," Talvity said. "It was good, we scored a few goals, it was an incentive for our confidence."
Philip Kureashev (Chicago Blackhawks) scored the sixth goal for Switzerland, who plays Russia for third place on Saturday.
"The team that wants more will win and we will leave it in ice," Swiss defender Simon Le Cultre said.
Switzerland made the semifinal defeat from Sweden with 2: 0 and 41 from the reinforcements of Luca Hollenstein, but the NHL goalkeeper in 2019 was drawn four goals on eight shots on Friday at 7:43.
Ilonen, the second-placed player (No. 35) in the 2018 championship, scored 40 seconds, and Talvitie, who won the sixth round (No.160) of the 2017 NHL, scored 2-1 at 3-0.
Jokiharju, who was selected 29 in the 2017 draft and played 32 Blackhawks games this season, scored a power-up game to make it 4-0.
Akira Schmid (Devils) made 23 savings in relief for Switzerland, which won her only WJC medal in 1998 (bronze). Russia defeated Switzerland 7: 4 in the preliminary round; the game was tied 3-3 after two periods.
"We played good 40 minutes," said Le Cultre. "Now we have to play 60th."