New Zealand perform a Haka after winning the men's title at the Sydney World Rugby Sevens Series event ©Getty Images

New Zealand were unstoppable as they captured the men’s and women’s titles in emphatic fashion at the Sydney leg of the World Rugby Seven Series.

The Black Ferns thumped France 35-0, while the All Blacks produced an even bigger win, seeing off South Africa 38-0 in the Australian capital.

The victories extended New Zealand's leads in the respective standings with the women moving 12 points clear and the men establishing a nine-point gap at the top.

The All Blacks built-up a 17-0 lead at half-time at the Allianz Stadium before hammering home their advantage in the second period.

Roderick Solo, Joe Webber, Sam Dickson, Akuila Rokolisoa, Amanaki Nicole and Ngarohi McGarvey-Black all got on the scoresheet in New Zealand’s six-try victory.

"To hold South Africa to nil is pretty impressive," said Webber.

"The boys have been working really hard over the last couple of months and we really deserved that one."

The bronze medal went to two-time Olympic champions Fiji who powered to a 29-5 win over France.

Iowane Teba struck twice before Viwa Naduvalo, Manueli Maisamoa and Alasio Naduva crossed the whitewash.

The women’s final was also one-sided with Tenika Willison and Jazmin Felix-Hotham notching braces in New Zealand's triumph.

Portia Woodman-Wickliffe also went over for the fifth converted try in a scintillating performance against France.

The United States claimed bronze after a 12-5 success over Ireland courtesy of tries from Sammy Sullivan and Kristi Kirshe.