Canada's Mary Fay won a see-saw battle against the United States with a 7-4 victory to capture gold at the world junior curling championships.

USA took an 1-0 early lead in the second end, before Fay's Nova Scotia squad — third Kristin Clarke, second player Karlee Burgess and lead Janique LeBlanc — went ahead in the third as the skip drew her final stone into the house to score two points.

The Americans tied it 2-2 in the fourth, Canada went ahead 4-2 in the six and USA replied with two of their own in the seventh to tie it again at 4-4. Canada restored its two-point advantage in the eighth and stole one in the ninth to take a decisive 7-4 lead.

"It feels amazing to have won this with my best friends, it's surreal and hasn't sunk in yet, and I'm so proud of my team for all their hard work," Fay said.

American skip Cory Christensen said Canada took advantage of her team's miscues.

"We just didn't come out shooting as well as we should have. We had a few key misses and Canada capitalized and they played awesome."

Fay went undefeated through the round robin and lost a heartbreaker to the United States in the Page 1-2 playoff game on its way to the final.

Korea took the bronze with an 8-4 win over Hungary.

In men's action, Winnipeg skip Matt Dunstone led Canada to an 8-4 win over Switzerland in the bronze-medal game.

Scotland defeated the United States 6-4 to claim the men's gold medal.