Futsal also known as futebol de salão in Portugal and fútbol sala/de salón in Spain, is an indoor version of 5-a-Side.  It is played between two teams of five players, of which a team can have up to a maximum of seven substitutes.

 

Normally the game is played on a hard surface which is maked out with lines, of which walls and boards are not used.  A specially designed ball is also used which is heavier than the normal football, which reduces the amount of bounce than a normal regulation football.