The first round, or pool stage, saw the 20 teams divided into four pools of five teams, using the same format that was used in 2003, 2007, and 2011. Each pool was a single round-robin of ten games, in which each team played one match against each of the other teams in the same pool. Teams were awarded four points for a win, two points for a draw and none for a defeat. A team scoring four tries in one match scored a bonus point, as did a team that lost by fewer than eight points.