England overcome Argentina
England opened their Hong Kong Sevens campaign with a 19-10 win over Argentina on Friday.
The result left them second in Pool A on points difference behind Samoa, who were 19-7 winners over Kenya.
England needed a strong finish to see off the Argentinians, coming from 5-0 and 10-5 down.
Facundo Panceyra Garrido scored the opening try and, after Dan Norton had crossed for England, Diego Palma put the South Americans 10-5 in front early in the second period.
But Rob Vickerman and Mat Turner added further tries for England, both converted by Tom Mitchell, to see them home.
Defending champions New Zealand, who beat England in the final last year, started with a 29-5 win over the United States in Pool B, while South Africa beat Wales 10-0.
In Pool C, Fiji beat Scotland 39-5 and Australia defeated France 31-10.
Wales conceded two tries in their defeat to South Africa, while Fiji ran in seven against the Scots, whose lone score came courtesy of Michael Fedo and briefly got them back to 7-5.