FILE - In this Aug. 11, 2016, file photo, Viliame Mata of Fiji evades a tackle during the gold medal mens rugby sevens match against Britain at the 2016 Summer Olympics in Rio de Janeiro, Brazil. It was rugby in fast forward and it generated millions of new fans across the world. Rugby sevens made its Olympic debut in Rio de Janeiro in 2016 bringing all the usual hard-hitting tackles, collisions and swerving runs but leaving out the slow-mo elements of the traditional 15-a-side game. (AP Photo/Robert F. Bukaty, File)

FILE - In this Aug. 8, 2016, file photo, Australia's Evania Pelite, right, scores a try as New Zealand's Kelly Brazier chases during the women's rugby sevens gold medal match at the Summer Olympics in Rio de Janeiro, Brazil. It was rugby in fast forward and it generated millions of new fans across the world. Rugby sevens made its Olympic debut in Rio de Janeiro in 2016 bringing all the usual hard-hitting tackles, collisions and swerving runs but leaving out the slow-mo elements of the traditional 15-a-side game. (AP Photo/Themba Hadebe, File)

FILE - In this Aug. 11, 2016, file photo, Britain's Dan Norton, left, is tackled by Fiji's Osea Kolinisau, during the men's rugby sevens gold medal match at the Summer Olympics in Rio de Janeiro, Brazil. It was rugby in fast forward and it generated millions of new fans across the world. Rugby sevens made its Olympic debut in Rio de Janeiro in 2016 bringing all the usual hard-hitting tackles, collisions and swerving runs but leaving out the slow-mo elements of the traditional 15-a-side game. (AP Photo/Themba Hadebe, File)

FILE - In this Aug. 8, 2016, file photo, Australia's players celebrate after winning the women's rugby sevens gold medal match against New Zealand at the Summer Olympics in Rio de Janeiro, Brazil. It was rugby in fast forward and it generated millions of new fans across the world. Rugby sevens made its Olympic debut in Rio de Janeiro in 2016 bringing all the usual hard-hitting tackles, collisions and swerving runs but leaving out the slow-mo elements of the traditional 15-a-side game. (AP Photo/Themba Hadebe, File)

FILE - In this Aug. 11, 2016, file photo, Fiji rugby players show off their gold medal after defeating Britain in the gold medal mens rugby sevens match against Britain at the 2016 Summer Olympics in Rio de Janeiro, Brazil. It was rugby in fast forward and it generated millions of new fans across the world. Rugby sevens made its Olympic debut in Rio de Janeiro in 2016 bringing all the usual hard-hitting tackles, collisions and swerving runs but leaving out the slow-mo elements of the traditional 15-a-side game. (AP Photo/Robert F. Bukaty, File)