Cape Town - Samoa have stunned the Blitzboks at the Paris Sevens, running out deserved 21-10 winners in a quarter-final encounter.
The Blitzboks got off to a flying start with Ruhan Nel scoring an unconverted try within the first minute as he forced his way over the line after an early penalty.
Samoa took the lead through a converted long-range effort from Ed Fidow and although both sides had further chances, the islanders went into the break with a slender 7-5 lead.
In the second half, Samoa extended their lead with tries by Alefosio Tapili and captain Falemiga Selesele.
They led 21-5 with just three minutes to play and with the Blitzboks left with a mountain to climb.
Nel scored his second of the match with just a minute remaining, but it was too little too late as Samoa pulled of a massive upset, holding on to run out 21-10 winners.
They will now face Argentina while the Blitzboks will move into the plate section of the competition where they will face New Zealand.