The two teams were the only nations to reach the last eight by winning all of their group matches during a fascinating opening day at the BC Place Stadium.

South Africa and England also went unbeaten on their way to booking their spots in the next round.

They each claimed two victories in Pool A and then played out a 12-12 draw in their last group game.

New Zealand, currently fourth on the overall standings, began in confident fashion with a commanding 40-0 victory over Russia in Pool D.

The All Black Sevens then overcame Scotland 33-12 before they were pushed all the way by a raucous crowd cheering on the home side, claiming a narrow 15-14 win.

New Zealand are due to go up against England in the quarter-finals tomorrow.

The US were also in good form on day one as they began with an eight-try haul in a 52-0 thrashing of Japan, who made it to the semi-finals at last year's Olympic Games in Rio de Janeiro.

The American side accounted for France in their second match with a 31-19 success and rounded off their pool phase by beating Australia 29-5.

Their opponents in the last eight will be Argentina, who caused one of the upsets of the Sevens Series so far when they overcame Olympic champions Fiji 26-24 in a thrilling Pool B clash.

The Rio 2016 gold medallists still reached the next round, where they will play Australia.

Canada delighted the home crowd by progressing to the quarter-finals as they beat Scotland 28-15 and Russia 26-5.

Their victories, which came before the defeat to New Zealand, setting up a tie with current Series leaders and Olympic bronze medallists South Africa.