Canada next plays Switzerland. The Americans, who finished second in the qualifying round, play the tougher Finns.

In Moscow, Evgeni Malkin scored the winning goal and assisted on another as Russia remained undefeated with a 4-2 win over defending and Olympic champion Sweden. Russia, the other top seed in the quarters, will face the Czech Republic. Sweden will play Slovakia.

Canada's Jay McClement scored eight seconds into the game, but the International Ice Hockey Federation could not confirm if that was a championship record.

"It was huge for us. It set the tone," Lombardi said. "Basically, we started the game with a 1-0 lead."

Mike Cammalleri put Canada up 2-0 less than two minutes later, banging in a cross-crease pass from Eric Staal on the power play.

"It's the first time we scored first all tournament," McClement said. "Then the second goal kind of took the wind out of their sails."

Lombardi made it 3-0 at 12:48. Cammalleri scored his second less than a minute later, tipping in a slap shot from Dan Hamhuis.

Paul Stastny scored for the U.S. at 9:47 of the second, but Lombardi added his second with a slap shot from the top of the circle at 15:19. Lee Stempniak reduced the gap less than three minutes later, one-timing a perfect pass from Erik Johnson.

In the third period, the U.S. replaced the embattled goalie John Grahame with Jason Bacashihua.

Lombardi completed his hat trick at 11:58 in the final period. Stastny also scored for the U.S., at 13:42.

"Hopefully we'll meet again in a more meaningful game later on," Stempniak said.

Malkin scored on a slap shot from the high slot at 9:51 of the third period, beating Sweden goalie Erik Ersberg low on the stick side to put Russia up 3-2. Alexei Morozov put the game out of reach at 16:33 when he took a pass from Sergei Zinoviev and wristed a shot past Ersberg from the faceoff circle.

Alexander Steen tied it 2-2, picking up a loose puck in close and slipping it between the pads of Russian goalie Alexander Eremenko at 18:22 of the second period. Denis Grebeshkov gave Russia a 2-1 lead three minutes into the second period, stuffing in a rebound behind Ersberg.

Sweden took a 1-0 lead at 8:43 of the first period when Martin Thornberg beat Eremenko on the power play. Russia tied it in the 17th minute when Alexander Kharitonov split two Swedish defenders and was hauled down, giving Russia a penalty shot. Alexei Morozov lifted a backhand over the shoulder of Ersberg.

Earlier, with only tournament rankings at stake, Michael Wolf scored twice, including the winner, to lift Germany over Belarus 6-5 and improve his country's chances of an automatic berth for the 2010 Olympics. Germany was ninth at the worlds and Belarus 11th.

Denmark defeated Italy 5-2 in the final game for both teams. The Danes ended 10th and claimed their first top-10 finish since joining the top division in 2003. The Italians finished 12th.

This tournament and the 2008 worlds in Canada count toward Olympic qualification in Vancouver, following which the top nine teams in the IIHF rankings directly enter the Olympics. Those ranked 10th and worse will compete for the last three spots.