The term World Series of Soccer was initially a series of senior international soccer matches held by USSF between 1991 and 1994. In 2005, Major League Soccer re-introduced the name for a series of professional matches in the United States.
The term World Series of Soccer was initially a series of senior international soccer matches held by USSF between 1991 and 1994. In 2005, Major League Soccer re-introduced the name for a series of professional matches in the United States. (en)