South America Tennis Confederation ( or COSAT) () is a private non-profit organization, affiliated with International Tennis Federation. It is the regional body of tennis associations of most of the nations of the South America, excluding Guyana and Suriname, which are the members of Central American & Caribbean Tennis Confederation (COTECC).
Member nations South America Tennis Confederation affiliates ten South American nations: Country Association Headquarter Argentina Tennis Association Buenos Aires Bolivian Tennis Federation La Paz Brazilian Tennis Confederation Florianópolis Colombian Tennis Federation Bogotá Chile Tennis Federation Santiago Ecuadorian Federation of Tennis Guayaquil Paraguayan Tennis Association Asunción Tennis Federation of Peru Lima Uruguayan Association of Tennis Montevideo Venezuelan Tennis Federation Caracas
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