irbsevens.com and James Mortimer 13.May.2012Getty Images
The defending champions, the only nation to ever go back-to-back with Sevens titles, are now just one win away from clinching the 2011/12 HSBC Sevens World Series.
Fiji, Australia and Samoa were the other teams with 100% records heading into the Cup quarters, the Samoans defeating hosts England in the final match of the day.
A world record Sevens crowd of 60,050 passed through the Twickenham turnstiles on day one, breaking the previous record of 54,357 set last year and creating a thrilling atmosphere at the final round of the Series.
New Zealand ended the day with a tight 15-10 victory against Argentina, having earlier scored seven tries in their 49-7 victory against Rugby World Cup Sevens 2013 hosts Russia.
Tomasi Cama and Frank Halai have both been nominated for the IRB Sevens Player of the Year award, and continued to impress in their victory with two tries each.
Cama added his third of the tournament and captain DJ Forbes scored his 100th career try in their second win of the day, 24-0 against Kenya.
Forbes marked his 50th World Series tournament with victory in Glasgow last weekend, which is ominous for the other 15 participating teams as London sees vice captain Lote Raikabula reach the same landmark.
However the result of the day had to go to Spain, recently qualified as one of the new core teams of the circuit, defeating Wales 27-7 to qualify for their first Cup quarter-final.
Australia, winners in Tokyo, ensured South Africa's difficult season continued victorious 19-17, meaning that the 2008/2009 champions finish the campaign without a Cup win.