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LAS VEGAS, NV - MARCH 06: Carlin Isles (L) of the United States holds offs Seabelo Senatla of South Africa during the USA Sevens Rugby tournament at Sam Boyd Stadium on March 6, 2016 in Las Vegas, Nevada. South africa won 21-10. (Photo by David Becker/Getty Images)

LAS VEGAS, NV - MARCH 06:  Carlin Isles (L) of the United States holds offs Seabelo Senatla of South Africa during the USA Sevens Rugby tournament at Sam Boyd Stadium on March 6, 2016 in Las Vegas, Nevada. South africa won 21-10. (Photo by David Becker/Getty Images)