Water volleyball is a team sport derived from volleyball in which the games are played in water. The sport is played in the United States, Europe and South America. Water volleyball is mostly played in swimming pools. The court used varies from 3 X 2m to 6 X 5m in dimensions. A net that runs across the width of the court divides it into two equal halves. Different types of balls are used for playing, but the most suitable is a beach ball which is at least 28cm in diameter. The sport is played at both recreational and competitive level. For recreational play, a team can have for 1 to 4 players, but in competitions each team should have four players. Similar to that of volleyball, each play starts with a serve, followed by back and forth returns, until one team scores a point. However, the game play and scoring system works similar to that of table-tennis, where each team alternately gets to serve twice regardless of who scores the point, and the team to first reach 11 is the winner of the set. There are some variations in, court size, the number of players per team, and the total number of sets played in a match, depending on which country the game is being played at.