Futsal is an indoor version of assosiation football. Its name is derived from the Portuguese futebol de salão and the Spanish fútbol sala/de salón, which can be translated as 'indoor football'.
Futsal is played between two teams of five players, one of whom is the goalkeeper. In addition each team may have 7 substitutes. Unlike some other forms of indoor football, the court is delimited by lines, and not walls or boards that players can use to rebound the ball. Futsal is played with a smaller ball with less bounce than a football.The emphasis is on improvisation, creativity and technique.
Other forms of indoor football games, which are played by somewhat different rules, exist and may be referred to as indoor football, five-a side football or indoor soccer . Those games predate the formulation of official (FIFA) rules of futsal.