South Africa's Cornal Hendricks (L) is tackled by Uruguay's Santiago Gibernau at the USA Sevens Las Vegas on February 8, 2013. South Africa ended the day with a perfect 2-0 record. They routed Uruguay 45-0 then followed up with a 17-5 victory over Canada.Defending champions Samoa came from 12-0 behind to beat Spain 19-12 on the opening day of the US stop in the IRB Sevens World Series. Captain Afa Aiono scored the winning try under the posts, delighting a vocal contingent of Samoa fans at Sam Boyd Stadium. "It was really tough.