The United States dominated host Denmark 4-0 to raise its record to 2-0 at the men's world ice hockey championships on Saturday.
The Czech Republic rallied from a goal down to beat Slovakia 3-2 in overtime, and South Korea's debut at the championship was memorable for the wrong reason as it lost to Finland 8-1.
After saving 40 shots against Canada, goalie Keith Kinkaid was outstanding again, finishing with a 20-shot shutout.
"I felt pretty sharp today," Kinkaid said. "Maybe even sharper than yesterday."
Will Butcher and Chris Kreider each had a goal and an assist.
Butcher wristed the first goal over the shoulder of goalie Frederik Andersen in the first period.
Kreider deflected a slap shot by Quinn Hughes on a power play to double the lead in the second, and Cam Atkinson made it 3-0 on a rebound.
The U.S. killed Denmark's two-man advantage in that period.
