Description: P.K. Subban breaks down the impact American brothers Matthew and Brady Tkachuk will have on the USA vs. Canada matchup in the 4 Nations on Saturday, live on ABC at 8 p.m. ET.

Team USA would go on to win their tournament opener 6-1 over Finland, but it began with a bit of nervousness from the Winnipeg Jets' netminder Connor Hellebuyck.