The 1930 FIFA World Cup was the inaugural World Cup tournament held in Uruguay. 13 national teams participated in the first ever World Cup. The tournament used a group stage format followed by semi-finals and a final. Uruguay defeated Argentina 4-2 in the final to become the first ever World Cup champions. With an attendance of over 590,000, the 1930 World Cup laid the foundation for what would become the largest single-sport tournament in the world.