Russia, the only team in New Zealand making its rugby World Cup debut, became the 20th and last to join the party Thursday but it was the United States who celebrated after securing a 13-6 victory in the day's only match. It was the States' third win in 19 World Cup games, the previous two both coming against Japan, but is likely to be their last of this tournament as they now face Australia and Italy having lost to Ireland in their Pool C opener. Russia's World Cup bow might have delighted the International Rugby Board, who are desperate to expand the game's boundaries.World Cup action continues on Friday when the host takes on Japan in Hamilton.