MINSK, Belarus - The United States and Russia both began their world championships with big wins while the Czech Republic earned an overtime victory.
In Group B, the Americans brushed aside host Belarus 6-1 and Russia showed off its attacking power in a 5-0 win over last year's runner-up Switzerland. The Czechs edged Slovakia 3-2 in their Group A game.
Winnipeg Jets defenceman Jacob Trouba scored twice for the U.S., while New York Islanders forwards Brock Nelson and Colin McDonald also added goals, along with Johnny Gaudreau of the Calgary Flames and Jake Gardiner of the Toronto Maple Leafs.
"I liked the competiveness of our guys," U.S. head coach Peter Laviolette said.
Andrei Stepanov scored the consolation goal for Belarus in front of a roaring home crowd of some 15,000 spectators.
Jaromir Jagr tied the game for the Czechs at 2-2 with 2:07 left in regulation before Jakub Klepis scored the winner 1:50 into overtime.
Russia's high-scoring team got goals from Sergei Plotnikov, Washington Capitals star Alex Ovechkin, Vadim Shipachyov, Anton Belov and Danis Zaripov. Goaltender Sergei Bobrovski of the Columbus Blue Jackets recorded the shutout.
"We played very well as a team," Bobrovski said.
Russia needed just 13 seconds to open the scoring through Plotnikov, and Ovechkin doubled the lead six minutes later with a powerful slap shot on a power play. Ovechkin also added an assist.
"We did some good things but when you don't score a goal it's difficult to win any game, obviously," Swiss coach Sean Simpson said.