"I was quite fortunate out there today", Soyizwapi said after becoming only the ninth player (and the first since 2005) to score four tries in a Rugby World Cup Sevens match.
"Having the opportunity to play in the marquee sevens event here in the United States is just so exciting. Hopefully we can cause another surprise this weekend".
Hosts United States booked their place in the quarter-finals of the Rugby World Cup Sevens men's tournament with heavyweights Fiji and New Zealand as Australia bowed out of the competition.
Australian women 7s rep Elia Green during the opening ceremony in San Francisco on July 20, 2018.
Meanwhile six men's players will be appearing at the Rugby World Cup Sevens for the third time: James Rodwell (England), Manoel Dall Igna (France), Collins Injera (Kenya), Alatosi Tupou (Samoa), Scott Riddell (Scotland) and Philip Snyman (South Africa).
Ireland, who faced tournament favourites New Zealand in the Championship quarter-final in the early hours, took the lead after just two minutes through a try from Ashleigh Baxter.
Britain’s Boris Johnson says ‘not too late to save Brexit’
West Streeting, a Labour MP who supports the campaign for a second referendum, said the speech was "a total damp squib". She told BBC Radio 4's Today programme: "We simply can not go on like this".
"I think a lot of people came all the way from Fiji to come and support the team".
It was simply tragic and heartbreaking when Samuel Oliech and Samuel Njenga were sin-binned in quick succession to let Scotland, who were trailing, to win at the death and sail through to the Cup quarterfinals.
New Zealand men's captain Scott Curry added: "It's awesome to be here in San Francisco".
"The stars of sevens will shine in the USA's Golden City and we look forward to three days of world-class rugby sevens that will further the reach and appeal of rugby across the nation and around the globe".
It means the Blacks Ferns retain the title they won in Moscow in 2013, the inaugural women's World Cup having been won by Australia in 2009. "Where the World Series was a marathon, this is more like a one hundred metre sprint", he said.
"We really played well against Russian Federation in our opening match, but against China we unfortunately did not deliver the same effort and commitment and I am not happy about that", the coach explained.