Canada wins the Billie Jean King Cup for the first time, completing the tennis double.

Canada's men are the reigning Davis Cup champions, having won their first title last November in Malaga.

On Sunday, Canada's women won the Billie Jean King Cup for the first time, winning both singles rubbers to establish an unassailable lead over Italy. 

Canada's men are the reigning Davis Cup champions, having won their first title last November in Malaga.

Marina Stakusic, an 18-year-old from Croatia, opened the final in Seville with a 7-5 6-3 victory over Martina Trevisan, capping off a remarkable week for the youngster.

The Canadian team celebrated after Leylah Fernandez defeated Jasmine Paolini 6-2, 6-3.

"I'm extremely happy, ecstatic," Fernandez said.

Canada, led by captain Heidi El Tabakh, became the 13th country to win the Billie Jean King Cup, and the second new champion in a row after Switzerland won in Glasgow a year ago.

This week, Stakusic, ranked 258th in the world, defeated three top 100 players, including Trevisan.

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