This is the part of the tournament where a power play or penalty kill can make or break a team. In both matchups, special teams will play a huge role. Both Finland and Sweden have solid rosters with loads of two-way talent.
Early in the tournament, Sweden was an ace on the power play, and it helped the Swedes cruise through group play. If Finland gets careless, Sweden will make the Suomi pay.
Likewise, special teams could dictate the matchup of Team USA vs. Canada. Team USA has the best PK unit in the tournament, and it includes forwards Ryan Kesler, Ryan Callahan, David Backes and Dustin Brown and defenders Ryan Suter, Ryan McDonagh and John Carlson.
Each of these players help their NHL teams back home, and having them assembled on one team is just overkill in the PK department.
If Team USA takes some bad penalties, it has a PK unit that can help it gain momentum. However, Canada has a number of offensive weapons that could make a difference, so that only reinforces how much of an X-factor special teams could be in the semis.
In short, special-teams situations will be a premium as the games continue, and they could have a direct impact on which teams win a medal.