Para los incrédulos del 7s como herramienta de potenciar el XV
http://www.worldrugby.org/news/122306
"World Rugby can reveal that just over a fifth of all the players named in their respective country’s original 31-man Rugby World Cup squads (135 of 620) came into the tournament boasting top level international rugby sevens experience including RWC 2015 top try scorer Julian Savea and Aussie points-machine Bernard Foley."