Johnny Gaudreau scored the only goal of the first period of the World Junior Championship quarterfinals to give the United States a 1-0 lead.
Gaudreau scored on an easy tap-in on a 5-on-3 penalty at the 11:45 mark of the first. The Czechs had taken back-to-back hooking penalties to go down by two skaters. Gaudream made them pay with his third goal in two games and the Americans' fifth power-play goal in the past four periods. The United States had four man-advantage goals in a 9-3 win against Slovakia on Monday.
The winner of this game plays Group B champion Canada in the semifinal on Thursday.
If you want to prove people wrong, you've just got to go out and do it. Yeah, we blew 3-2 series leads the last two years, but no one is going remember that if we go out there on Saturday night and beat these guys and go play in the Stanley Cup Final. We need to get back to work and we'll start to do that tomorrow.
— Ducks forward Kyle Palmieri following a loss to the Blackhawks in Game 6 on Wednesday