Story highlights New Zealand wins Dubai Sevens

Outscores USA three tries to one in final

Black Ferns lift women's title

(CNN) New Zealand won the opening tournament of the men's World Rugby Sevens Series in Dubai after beating the USA 21-5 in the final.

The victory, New Zealand's first in Dubai since 2009, backed up July's World Cup win in San Fransisco . The omens for this season are good, too, as for the past three seasons the winner of the season's first tournament has also gone on to lift the overall title.

Tone Ng Shiu's try gave the Kiwis a 7-0 lead heading into halftime, but they were reduced to six men at the start of the second period and Stephen Tomasin mustered a repsonse for the USA.

Scores from Dylan Collier and Ngarohi McGarvey-Black, however, ensured New Zealand wrapped up its sixth title in Dubai.

"I'm incredibly proud of how the boys played in those last two games," said captain Scott Curry, who was one of four injured New Zealand players sidelined during the final.

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