Alexei Yemelin (2nd R) of fights with Gustav Nyquist (1st R) of Sweden during Group A preliminary round game between Russia and Sweden of 2016 IIHF Ice Hockey World Championship in Moscow, Russia, on May 17, 2016. Russia won 4-1. (Xinhua/Evgeny Sinitsyn)

Sergei Kalinin (3rd R) of Russia breaks through as Mikael Backlund of Sweden defends during Group A preliminary round game between Russia and Sweden of 2016 IIHF Ice Hockey World Championship in Moscow, Russia, on May 17, 2016. Russia won 4-1. (Xinhua/Evgeny Sinitsyn)

Roman Lyubimov (L) of Russia vies with Mattias Ekholm of Sweden during Group A preliminary round game between Russia and Sweden of 2016 IIHF Ice Hockey World Championship in Moscow, Russia, on May 17, 2016. Russia won 4-1. (Xinhua/Evgeny Sinitsyn)

Jacob Markstrom (Bottom), golie of Sweden, lets the puck into his net during Group A preliminary round game between Russia and Sweden of 2016 IIHF Ice Hockey World Championship in Moscow, Russia, on May 17, 2016. Russia won 4-1. (Xinhua/Evgeny Sinitsyn)

Chris Wideman of the yells during Group B preliminary round game between the United States and Slovakia of 2016 IIHF Ice Hockey World Championship in St. Petersburg, Russia, on May 17, 2016. Slovakia won 3-2. (Xinhua/Pavel Bednyakov)

Keith Kinkaid (1st R), goalie of the United States, defends during Group B preliminary round game between the United States and Slovakia of 2016 IIHF Ice Hockey World Championship in St. Petersburg, Russia, on May 17, 2016. Slovakia won 3-2. (Xinhua/Pavel Bednyakov)

Brady Skjei(C) of the United States vies with Vladimir Dravecky (L) and Pavol Skalicky of Slovakia during Group B preliminary round game between the United States and Slovakia of 2016 IIHF Ice Hockey World Championship in St. Petersburg, Russia, on May 17, 2016. Slovakia won 3-2. (Xinhua/Pavel Bednyakov)