FOG BLOG BEIJING OLYMPICS LOG: CDN WOMEN'S HOCKEY TEAM DOUBLES U.S. PUTS ITSELF IN RUNNING FOR GOLD.

Canada doubles up on rival U.S. to complete perfect round robin in women's hockey.......Captain Marie-Philip Poulin scores 1st-ever Olympic women's penalty-shot goal in win....Once again, it was Marie-Philip Poulin delivering the defining moment of a Canadian women's hockey victory over the U.S.

Canada's Captain Clutch scored on a short-handed penalty shot, Brianne Jenner added a pair and goalie Ann-Renée Desbiens made a whopping 51 saves in a 4-2 win to clinch the top spot in Group A on Tuesday at the Beijing Olympics.

The win means Canada finishes the preliminary round at 4-0, having outscored its opponents 33-5. The Americans enter the knockout rounds as the second seed.

But head coach Troy Ryan remains focused on what's ahead.

"I'd always rather be on this side of it, but history says it doesn't necessarily mean a lot. We are happy that we continue to gain confidence. We also like the fact that we didn't play our best but still found a way to win."Barring a major upset, the sides will meet again in the gold-medal game on Feb. 16 at 11:10 p.m. ET at the Wukesong Sports Centre.

That's when true Olympic heroes will be made.

But the latest goal from Poulin, who's scored so many for Canada since her 2010 Olympic debut including two gold-medal clinchers, shouldn't be completely forgotten.

It was the first penalty-shot marker in Olympic women's hockey history. And it also may have served as a bit of redemption for the 30-year-old, who was stopped by American goalie Maddie Rooney with the game on her stick in the shootout of the 2018 Olympic final.

This time, Poulin made no mistakes, lifting the puck over Rooney's pad and inside the left post while moving in the opposite direction.

"You have one of the top players in the world going in on a penalty shot, so you get pretty excited," Desbiens told The Canadian Press. "She comes up clutch for us day in and day out and when it matters, that's when she's at her best. We saw that again today."