When: Feb. 14.
Best of the U.S.: Ashley Caldwell and Emily Cook.
Best of the rest: Reigning world champion Xu Mengtao, Li Nina and Xin Zhang, all of China, and Australians Danielle Scott and Lydia Lassila. Lassila won gold in Vancouver.
U.S. chances to medal: Places on the podium are widely expected to come down to a battle between Australia and China.
Little-known fact: The competition, once spread over two days, has been compressed into a one-day event, and points no longer carry over from round to round.