Alexandra Edebo won all four of her races to claim a first-ever world Cup victory ©Getty Images

David Mobärg and Alexandra Edebo secured a Swedish double at the season-opening International Ski Federation (FIS) Ski Cross World Cup contest in Arosa.

Both secured maiden World Cup victories under floodlights at the Swiss resort.

In the men's contest, 21-year-old Mobärg was the only non-Swiss skier in the final but triumphed ahead of 2012-2013 champion Alex Fiva, who came second.

Berry Joos was third and Jonas Lenherr fourth.

Mobärg, tied for the third-fastest time of qualifying, won four of his five races, placing second in the quarter-finals.

Olympic champion Brady Leman, who topped qualifying, exited in the round of 32, as did defending FIS Ski Cross World Cup champion and fellow Canadian Kevin Drury.

In the women's contest, Edebo ended the night with four wins from four races.

Pyeongchang 2018 bronze medallist Fanny Smith of Switzerland was second and Australian Sami Kennedy-Sim, fastest in qualifying, third.

Alizée Baron of France, who won a bronze medal at last year's World Championships, placed fourth.

Canada's Marielle Thompson, third in the overall standings last season, went out in the first round.

A second World Cup contest is scheduled tomorrow.