It is kind of funny that some people are acting like Czechia is some type of legit threat to win today. They will not be able to replicate that performance again, not against Canada. They wouldn't beat USA again today if they were playing them.
They really made things hard on us, but USA still carried the play the entire game. They got sticks on nearly every key chance. They certainly produced a few decent scoring chances to give themselves the chance to get a couple goals on the board, but nothing crazy. USA had a good, persistent roster that worked hard. But we lacked having a few elite players that could emerge and get the job done when things weren't going our way. Canada has enough of those guys on this roster that will find a way if they did end up in that tight of a situation.
I'm not taking anything away from Czechia. They showed up, they brought everything they had, they gave themselves a chance and enough things went there way that day.