Australia and New Zealand have won 17 of the 22 rounds since the HSBC World Rugby Women 's Sevens Series began in the Dubai desert in December 2012 .
They will both step into uncharted territory at the HSBC USA Sevens on Friday .
Australia and New Zealand have won 17 of the 22 rounds since the HSBC World Rugby Women 's Sevens Series began in the Dubai desert in December 2012 , but they will both step into uncharted territory at the HSBC USA Sevens on Friday .