The first doping case hit the Sochi Olympics on a day when the United States and Canada were set to renew their rivalry in men's hockey.

The German Olympic Committee said it was notified by the IOC that one of its athletes had tested positive. The athlete was not identified and a backup test was being run Friday.

The U.S. and Canada, both unbeaten at Sochi, awaited a rematch of the 2010 and 2002 gold-medal games that Canada won. Top-seeded Sweden was playing Finland in the other semifinal, a rematch of the 2006 Turin Games final won by the Swedes. The winners go for gold Sunday.

Marielle Thompson of Canada won the gold in women's skicross, edging teammate Kelsey Serwa. It was Canada's second gold-silver finish in a freestyle skiing event during the games.

On Day 15 at the Olympics, medals also were being awarded in Alpine skiing, biathlon, curling, and short track speedskating.


FREESTYLE SKIING: Canada's other 1-2 finish in freestyle skiing came during the games' opening weekend, when sisters Justine and Chloe Dufour-Lapointe dominated moguls. In the skicross final, Thompson took an early lead and never let up. Ophelie David of France wiped out about two-thirds down the course, giving the bronze to Sweden's Anna Holmlund.


CURLING: Sweden won the bronze in men's curling, taking an extra end to defeat China 6-4.