The Australian women’s team kicked-off their home tournament with a clean-sweep of victories, to set up a quarter-final with Spain after the first day of the Sydney 7s.
New Zealand's three wins sets up a meeting with Ireland while Canada will play France.
USA and Russia complete the last eight.
The Challenge Trophy semi-finals are England v Papua New Guinea and Japan v Fiji.
With the Rugby World Cup Sevens just over six months away in San Francisco teams will not only be battling it out for the HSBC Sydney Sevens title but also crucial Rugby World Cup Sevens seedings points that will determine the draw for the tournament.
As the sun set in Sydney eight men's matches started the third leg of the HSBC World Rugby Sevens Series with the Blitzboks, New Zealand and Australia impressing.
In Pool C defending series champions racked up a half-century of points against Papua New Guinea. New Zealand were in a clinical mood against Russia and ran in nine tries in Pool A whilst Fiji prevailed over Samoa.
The other Pool C clash saw England start their campaign with a 22-10 victory and both France and Argentina opened their accounts with victories in Pool B.
Australia and the USA were involved in the toughest tussle of day one with the hosts prevailing 26-19 thanks to Tim Anstee's length-of-the-field try and Scotland finished the day on a high note with a 52-2 victory over Canada.