Hosts South Africa and Portugal were the only teams to remain unbeaten on day one of the Cell C Nelson Mandela Bay South Africa Sevens.
After an enthralling day one of the third round of the HSBC Sevens World Series they will now face USA and France respectively in the Cup quarter finals.
In the other two Cup quarter finals Wales will meet Series leaders New Zealand, whilst Fiji await Argentina.
England missed out on the Cup for a third successive tournament, as did last week's Dubai Sevens winners Samoa, who will also compete in the Bowl.
Video: Day one highlights
Pool A (SAM, FRA, RSA, AUS)
Hosts South Africa won all three of their matches at the Nelson Mandela Bay South Africa Sevens after they ended with an impressive 17-7 victory against Australia.
Cornal Hendricks and Paul Delport earlier helped Paul Treu's side beat France 12-5, and their first match was a repeat of last year's Cup semi final, in which they were able to record a 29-7 victory against last week's champions Samoa thanks to a hat-trick from Chris Dry. France also opened up with a victory, beating Australia 31-5 thanks to 14 points from Terry Bouhraoua and they ended the day with a 12-7 defeat to Samoa but reached the quarter finals on points difference.
Having won the Cup last weekend in Dubai, Samoa were unable to reproduce that form as they suffered a second defeat, 26-7 against Australia, leaving them with too much to do against France late on.
Pool B (NZL, FIJ, SCO, ENG)
Fiji booked their place in the Cup quarter finals with a 24-12 victory against New Zealand. The Gold Coast Sevens champions knew a victory would confirm their place in the last eight after they had earlier suffered a shock 21-19 defeat to Scotland.
In an enthralling match Andrew Turnbull scored twice, as did Fiji's Joji Raqamate, but it was captain Colin Gregor's try and conversion at the death that made the difference. New Zealand join Fiji in the Cup competition on day two after they also recorded two wins, coming from 7-0 behind to beat Scotland 14-7 before a 24-7 defeat of England.
Fiji also beat England 29-19 thanks to two tries from captain Setefano Cakau but Ben Ryan's side ensured they ended day one with a victory, beating the auld enemy Scotland 33-12, a match which saw Dan Norton notch up his 100th career try.
Pool C (KEN, WAL, ARG, ESP)
Argentina and Wales reached the Cup quarter finals from Pool C in yet another enthralling contest. Wales headed into their final match with Kenya knowing a win was required, and Paul John's side ensured their place in the last eight with a 33-12 victory over Mike Friday's Kenyans.
Wales beat Spain 12-5 in their first pool match, Rhys Jones and Will Thomas scoring for the current Sevens world champions. However they were pinned back in their second clash of the day when Argentina came from behind to beat them 12-7 in a tense clash. Argentina won their second match of the day, beating Spain 21-14.
Kenya had made it two wins from two on the opening day, beating Spain 26-14 in their second match, and will count themselves as unlucky to miss out on a place in the Cup on points differential.
Earlier, they stormed into a 21-0 lead at half time against Argentina thanks to tries from Andrew Amonde, Willy Ambaka and Davis Chenge, although los Pumas came back with three second half tries, but could only convert once in a 21-17 loss.
Pool D (CAN, POR, USA, ZIM)
Portugal entered the Cup stage for a second successive HSBC Sevens World Series tournament after winning all three of their games on the opening day in Port Elizabeth.
The Europeans got their campaign in Port Elizabeth off to a solid start, beating USA 26-12, before narrowly beating Zimbabwe 17-12. They ended the day with a resounding 28-7 win over Canada, confirming their place in the Cup.
Canada also beat Zimbabwe, 11 points coming from Nathan Hirayama to give them a 26-0 victory, but lost to rivals USA 26-12 in their second match after Phil Mack received an early red card and Luke Hume crossed twice for the Eagles.
USA won their second match against Zimbabwe 21-17 and thanks to Portugal's result joined the Portuguese in the Cup, with Canada and Zimbabwe battling in the Bowl on Sunday.
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