Sevens: Sarawaca stars as Fiji dazzle
Rawaca scored a dazzling opener in Fiji's 36-10 win over Wales and crossed again in the second half as the Series title-holders set up a quarterfinal against Kenya.
But England flagged after their upset win over South Africa on Day One when they were pegged back 12-12 by Russia in their final game in Pool B.
Fiji coach Ben Ryan was encouraged after his team, who are bidding to win their country's first ever Olympic gold in August, improved from Friday's 19-17 scare against Canada.
"We're still probably not absolutely firing, I think defensively we'll go up a notch tomorrow. But after what was a very tough game last night, it's good to come through unscathed," Ryan told AFP.
The former England coach added that the form of Rawaca, who will join Saracens next season, underlined the quality now on show in the Series.
"He's hit form. We've given him hard work in training. He's 108 kg's and that's a lot of muscle to throw around for 14 minutes and we ask him to play for 14 minutes most of the time as well.
"But he is playing well. He's very hard to stop... Save [Savenaca Rawaca] will play World Cup 2019 for Fiji, he'll stand out for Saracens. Gone are the days where these [Sevens] guys are seen as junior rugby players - they're world-class in their own right," Ryan added.
Two-time Rugby World Cup-winner Williams, who is trying to cement an Olympics spot for New Zealand, burst between two Samoa defenders to break his duck in Hong Kong. But Nick "Honey Badger" Cummins was sidelined with an ankle injury as Australia hammered Portugal before they were upset 22-17 by the United States.
New England Patriots Super Bowl winner Nate Ebner, another Olympic hopeful, stayed on the bench for the Americans after his exertions at this week's Hong Kong 10s. The lure of the Olympics has proved irresistible for Ebner and others as rugby makes its return to the Games in Rio de Janeiro after a 92-year gap.
In Sunday's quarterfinals, Fiji will play Kenya, New Zealand face Wales, South Africa are against the USA and England are pitted against Australia.
Schedule - Sunday, April 10
(Kick-off is local time are local - GMT plus eight hours)
France v Korea - 09.30
Argentina v Russia - 09.52
Canada v Samoa - 10.14
Scotland v Portugal - 10.36
Cup quarterfinals:
New Zealand v Wales - 10.58
USA v South Africa - 11.20
Fiji v Kenya - 11.42
England v Australia - 12.04
Shield:
Semifinal One - 13.30
Semifinal Two - 13.52
Bowl:
Semifinal One - 14.14
Semifinal Two - 14.36
Plate:
Semifinal One - 15.00
Semifinal Two - 15.22
Cup:
Semifinal One - 15.44
Semifinal Two - 16.06
Shield Final - 17.00
Bowl Final - 17.30
Plate Final - 18.00
Third/Fourth playoff - 18.30
Cup Final - 19.00