Best of the U.S.: Reigning world champions Meryl Davis and Charlie White.
Best of the rest: Reigning Olympic champions Tessa Virtue and Scott Moir of Canada.
U.S. chances to medal: Davis and White, Olympic silver medalists in 2010, are certain medalists as they try to become the first U.S. couple to win Olympic gold in dance. They have beaten their "frenemies" (same coaches, same training rink), Virtue and Moir, in the last four meetings.
Little-known fact: Virtue and Moir were the first team from North America to win gold since ice dance joined the Olympic program in 1976.