Six players per team dig, set and spike a volleyball over the net, trying to hit the ground on their opponent's court. Teams are only allowed to touch the ball three times before the ball must go over the net. 12 teams are divided into two pools of six teams with each pool playing a round-robin. The top four teams of each pool advance to the quarterfinals. Volleyball matches are played to the best of five sets. Each set is played to 25 points with a team needing a two-point advantage to win the set. The first team to three sets wins the match but when the match is tied at two sets each, the final set is played to 15 points. Players require amazing power and reactions, with the ball able to reach speeds in excess of 130km/h.