Jorien ter Mors led another Dutch sweep in Olympic speedskating, beating favorite Ireen Wust in the women's 1,500m and setting up a shot at becoming the first skater to win medals in both long and short track.
Competing in an early pairing, Ter Mors turned in a stunning time of one minute, 53.51 seconds, an Olympic record and the second-fastest ever at sea level.
Wust settled for silver this time in 1:54.09, with the bronze going to Lotte van Beek in 1:54.54.
The Dutch have now won a staggering 16 speedskating medals at Adler Arena, breaking the previous record haul of 13 set by East Germany at the 1988 Calgary Olympics.
Eva Samkova of the Czech Republic dominated women's snowboard cross on Sunday, posting three wire-to-wire victories on her way to Olympic gold.
The 20-year-old Samkova was easily the fastest in qualifying and never trailed in the elimination rounds, her board pulling her well clear of the madness behind her.
Dominique Maltais of Canada earned her second Olympic medal by grabbing silver. Chloe Trespeuch of France earned bronze.
Earlier, Kjetil Jansrud maintained Norway's stranglehold on the men's super-G by winning gold.
American Andrew Weibrecht, starting 29th, went one better than his third-place finish in Vancouver by winning silver, 0.30 seconds behind Jansrud, while 36-year-old American Bode Miller shared a bronze to become the oldest Olympic Alpine skiing medallist.
Swedes hold on
Sweden completed a double in Olympic cross-country relays when its men's team successfully defended its title in the 4x10km event.
A day after its women's team earned a narrow come-from-behind victory, Swedish anchor Marcus Hellner skied alone for the entire fourth leg and grabbed a Swedish flag to wave as he entered the stadium and went leisurely down the final straight.
Russia took silver in front of President Vladimir Putin. France finished third.
Sweden and Canada became the first men's teams to qualify for the Olympic curling semifinals, while Britain missed the chance to join them by losing to Norway.
Playing in front of their king, Carl Gustaf XVI, the Swedes beat Russia 8-4 in nine ends to move into the outright lead at 7-1. They are the reigning world champions.
Canada (6-2) stole a point at the last end to secure an 8-6 win over the US, which now cannot qualify.
Norway (4-3) staved off elimination with a 7-6 win over Britain (5-3), ensuring there will be plenty to play for going into the final day of round-robin action Monday.
Drew Doughty scored the overtime winner as Canada edged Finland 2-1 to close the preliminary round of the Olympic men's ice hockey competition on Sunday and keep their gold medal defence on course.
By taking top spot in Group B ahead of the Finns, unbeaten Canada will have a more direct route to the gold medal final than they did four years ago on home ice in Vancouver when they were forced to play an elimination game.
Doughty, a defenseman, continued to be an offensive force for Canada, scoring once in regulation and again midway into the five minute extra-session to give him a team-high four goals in three games.