The Blitzboks will aim to continue their domination of the World Sevens Series and complete a double in Spain this weekend, facing the hosts first up on Saturday. Spain ran the USA close in their opening match on Friday but will need to beat the Blitzboks to progress to the Cup quarterfinals. Spain vs Blitzboks – 11:57Blitzboks vs USA – 17:25Spain Sevens resultsWhat they saidStand-in Blitzboks skipper Impi Visser said: “We will have to be spot on come Saturday, as we have a bye on Friday and will not be in the same position as Spain and USA, who would have played a game already,” said. “We nee…