New Zealand celebrate back-to-back victories as they extended their lead in the World Rugby Sevens Series standings ©Getty Images

New Zealand saw off Argentina 22-12 to secure back-to-back men’s titles in the World Rugby Sevens Series in Los Angeles.

Leroy Carter was the star of the show for the All Blacks Sevens, notching five tries in an impressive day including two in the final at the Dignity Health Sports Park in California.

Argentina defeated New Zealand in Hamilton last month but they were unable to repeat their success as their opponents gained revenge to extend their lead in the standings.

Moses Leo opened the scoring, outpacing Marcos Moneta to score in the corner to give New Zealand a 5-0 lead.

That soon became 12-0 as Carter crossed and Akuila Rokolisao added the extras.

New Zealand let slip a 12-point lead in losing to Argentina in January, but any nerves were eased in first-half stoppage time when Carter went over again.

Argentina responded with tries from Tobias Wade and Agustin Fraga to set up a tense final two minutes, but New Zealand held their nerve, with Brady Rush touching down after a stunning dummy to ensure victory.

"We’ve been working hard for a few years now," said New Zealand captain Sam Dickson.

"We made a few finals last year and now we’re finally clicking, that hard work’s paying off."

Double Olympic champions Fiji overcame Australia 21-19 in an entertaining bronze-medal match.

Fiji burst into a 21-0 lead with Anasa Qaranivalu scoring inside the opening minute before Rokoua Rasaku and Rauto Vakadanu crossed either side of half-time with Waisea Nacuqu converting all three tries.

Australia refused to give in as Maurice Longbottom went over for an unconverted score before Dietrich Roache and Nathan Lawson struck.

Conversions from Roache and Longbottom got Australia to within two points but Fiji managed to withstand the fightback to seal bronze.