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Some of Team USA’s biggest stars stumbled yesterday. In the course of about an hour, Mikaela ShiffrinLindsey Jacobellis and Nathan Chen saw their Olympics take a turn for the worse.

Shiffrin let a medal in the slalom, an event she usually dominates, slip away on her second run. “Just nerves,” suggested the 22-year-old, who said she had vomited at the start of her first run. She finished fourth.

In her fourth attempt at Olympic snowboard cross gold, Jacobellis fell short, only fractions of a second off the podium, also ending up in fourth.

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Chen fell on his opening quad jump in the men’s figure skating short program, and his outing didn’t get any better from there. “I honestly have never been in this position before, so I don’t really know exactly what to do,” said Chen, who is in 17th.

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Defending gold medalist Yuzuru Hanyu of Japan, on the other hand, rose to the occasion. His nearly world-record performance –  “A masterpiece of epic proportions,” commentator Johnny Weir called it – gives him the lead going into tonight’s free skate (8 p.m. Eastern time on NBC).

It was a much better day for the host nation, whose Yun Sung-bin won gold in men’s skeleton. It was the first sliding medal ever for South Korea.

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In another notable development, Austrian skier Matthias Mayer took gold in the men’s super-G, breaking Norway’s four-Olympic winning streak in the event.

The Americans will try to redeem themselves tonight when Lindsey Vonn makes her PyeongChang debut in the super-G. At 33, she is trying to become the oldest female Alpine Olympic medalist. The race starts at 9 p.m, and Vonn runs first. Americans Maggie Voisin and Devin Logan (on her 25th birthday) also aim for gold in women’s slopestyle; those finals start at 11 p.m.

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On Saturday morning, the U.S. men’s hockey teamwhich beat Slovakia, 2-1, last nightfaces off against the Olympic Athletes from Russia in preliminary-round play at 7:10 a.m. A win would give Team USA the top spot in its group.

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And, as always, there’s more curling.

In medal events, the U.S. has a chance to end its biathlon drought, American Katie Uhlaender competes in women’s skeleton, women’s cross-country skiing is back, and short-track speedskating returns. Check out the “What to Watch” section for details.

Cross-country skier Kikkan Randall is the only mother on Team USA in PyeongChang. There are 20 fathers.

ICYMI: Japanese figure skater Yuzuru Hanyu has a long-standing link with Winnie the Pooh and was inundated by the stuffed animals following his performance in the men’s short program. And American freestyle skier Gus Kenworthy broke his thumb but still will compete in slopestyle.
Mikaela Shiffrin’s competitors took advantage of her rare slip-up in the slalom. Sweden’s Frida Hansdotter took gold, with Wendy Holdener (Switzerland) and Katharina Gallhuber (Austria) rounding out the podium.

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While Lindsey Jacobellis fell short of redemption in snowboard cross, it was a different story for Italy’s Michela Moioli. After tearing an anterior cruciate ligament in the finals at the Sochi Games, she came back to win gold in PyeongChang.

Figure skater Yuzuru Hanyu‘s score (111.68) in the men’s short program was nearly a world record. For the Americans, Adam Rippon is in seventh, and Vincent Zhou in 13th.

Matthias Mayer’s super-G gold was Austria’s first since Hermann Maier won in Nagano 20 years ago. Switzerland’s Beat Feuz (silver) and Norway’s Kjetil Jansrud (bronze) each won their second medals of the PyeongChang Games.

Behind South Korean Yun Sung-bin‘s gold medal finish in men’s skeleton, Nikita Tregubov of the Olympic Athletes from Russia claimed the silver, while Dom Parsons of Britain took bronze. American Matt Antoine finished 11th, and John Daly was 16th.

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Harvard’s Ryan Donato scored both goals in the U.S. men’s 2-1 hockey win over Slovakia. They lead the Group B standings.

American Ashley Caldwell missed the finals in women’s aerials. Her roommate, Kiley McKinnon, and teammate Madison Olsen advanced but failed to win a medal. Olsen was closest, in sixth. Belarus’s Hanna Huskova won gold, with two Chinese skiers, Xin Zhang (silver) and Fanyu Kong (bronze), rounding out the podium.

Speedskater Esmee Visser of the Netherlands won the women’s 5,000 meters. Germany’s Claudia Pechstein, 45, could have become the oldest Olympic speed skating medalist, but she finished eighth.

In round robin curling, the U.S. men lost to Sweden, 10-4, but beat Denmark, 9-5.

A correction from yesterday: It was Dutchman Jorrit Bergsma, not Sven Kramer, who won silver in the men’s 10,000-meter speedskating. Kramer finished sixth.

FRIDAY NIGHT:

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After a flurry of makeup races, Alpine skiing continues with the women’s super-G (9 p.m. on NBC). Lindsey Vonn missed the Sochi Olympics with an injury and has been struggling with setbacks since. But she has been skiing well recently. Swiss star Lara Gut and Tina Weirather of Lichtenstein are other favorites.

Yuzuru Hanyu of Japan has a solid lead going into tonight’s men’s figure skating free skate. He’s trailed by skaters from Spain, China, Russia and a Japanese teammate. The Americans are likely out of medal contention. Tune in starting at 8 p.m.

At the Sochi Games, freestyle skier Maggie Voisin broke her ankle, while Devin Logan took home a silver medal. In PyeongChang, both hope to find the podium. The finals start at 11 p.m.

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In round robin curling, the U.S. women take on the Olympic Athletes from Russia (7:05 p.m.) and Canada (6:05 a.m.).

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SATURDAY MORNING:

The U.S. men play the Olympic Athletes from Russia in hockey at 7:10 a.m. Both are 1-1.

At 6:15 a.m, Susan Dunklee has a chance to end the United States’ Olympic biathlon drought in the 12.5-kilometer mass start. Biathlon is the only Winter Olympic sport in which the U.S. has never won a medal.

American Katie Uhlaender was fourth in Sochi’s skeleton competition. Improving on that in PyeongChang could be difficult: She’s 12th after two runs. Germany’s Jacqueline Loelling is out front. Run 3 is at 6:20 a.m., run 4 at 7:45 a.m.

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Watch for Americans Maame Biney and John-Henry Krueger in short-track speedskating. While neither is expected to be in medal contention, they’ve both had compelling Olympic journeys. The host nation could have a big day. The women race in the 1,500 meters (7:05 a.m. finals), and the men skate the 1,000 meters (7:21 a.m. finals).

The women’s cross-country 4×5-kilometer relay starts at 4:30 a.m. The U.S. woman have steadily improved in this event in recent years, and they could contend for their first medal in the sport. “It’s the best women’s team in history,” Jessie Diggins told NBC. That said, Norway, Sweden and Finland are still the favorites.

Below is the medal count at the time of publishing. Find the most up-to-date medal count here.

Below is a TV roundup for the rest of today and tomorrow, taken from The Post’s comprehensive TV guide. All Olympic events can be streamed live online at NBCOlympics.com. (Here’s that schedule.) Times are Eastern.
Friday, Feb. 16

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NBC
3-5 p.m. Women’s speedskating, 5,000-meter gold; men’s cross-country, 15km gold; men’s ski jumping, large hill
8 p.m.-midnight Figure skating, men’s gold (LIVE); women’s skiing, super-G gold (LIVE); women’s freestyle, aerials gold; women’s skeleton
12:35-2 a.m. Women’s freestyle, slopestyle gold

NBCSN
10:45 a.m.-2 p.m. Women’s speedskating, 5,000 gold; men’s ski jumping, large hill
2-5 p.m. Women’s curling, South Korea-Switzerland
7-10:10 p.m. Figure skating, men’s gold (LIVE)
10:10 p.m.-12:30 a.m. Men’s hockey, Canada-Czech Republic (LIVE)
12:30-2:40 a.m. Women’s curling, U.S.-OAR

USA
7-9:30 a.m. Men’s hockey, Finland-Norway (LIVE)

CNBC
5-8 p.m. Men’s curling, U.S.-Denmark
10 p.m.-12:30 a.m. Women’s hockey, quarterfinal (LIVE)
Saturday, Feb. 17

NBC
3-6 p.m. Men’s freestyle skiing, aerials; women’s biathlon, 12.5km mass start gold; women’s cross-country, 4x5km relay gold
8-11 p.m. Men’s skiing, giant slalom first run (LIVE); short-track speedskating, men’s 1,000-meter gold and women’s 1,500-meter gold; women’s skeleton gold; men’s ski jumping, large hill gold
11:30 p.m.-1:30 a.m. Men’s skiing, giant slalom gold (LIVE); men’s freestyle skiing, slopestyle gold

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NBCSN
2:40-5 a.m. Men’s hockey, Switzerland-South Korea (LIVE)
5-7:10 a.m. Men’s curling, Canada-Sweden
7:10-10:30 a.m. Men’s hockey, U.S.-OAR (LIVE); men’s freestyle skiing, aerials
10:30 a.m.-1:30 p.m. Women’s cross-country, 4x5km relay gold; women’s biathlon, 12.5km mass start gold; women’s short-track speedskating, 1,500-meter gold
1:30-5:30 p.m. Women’s skeleton gold; men’s ski jumping, large hill gold
7-10:10 p.m. Men’s freestyle skiing, slopestyle (LIVE)
10:10 p.m.-12:30 a.m. Men’s hockey, Germany-Norway (LIVE)
12:30-2:40 a.m. Men’s curling, U.S.-Japan

USA
2:30-5 a.m. Women’s hockey, quarterfinal (LIVE)
5-7:10 a.m. Men’s curling, Switzerland-Norway
7:10-9:30 a.m. Men’s hockey, Slovakia vs. Slovenia (LIVE)

CNBC
5-8 p.m. Women’s curling, U.S.-Canada

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