Group 1 The first group was the only one to contain four teams: Argentina, Chile, France, and Mexico. Two days after France's victory over Mexico, they faced group favourites Argentina. Injuries hindered France; goalkeeper
Alex Thépot had to leave the field after 20 minutes and Laurent, after a fierce tackle by
Luis Monti, spent most of the match limping. However, they held out for most of the match, only succumbing to an 81st-minute goal scored from a Monti
free kick. The game featured an officiating controversy when referee
Almeida Rêgo erroneously blew the final whistle six minutes early, with Frenchman
Marcel Langiller clear on goal; play resumed only after protests from the French players. Although France had played twice in 48 hours, Chile had yet to play their first match. They faced Mexico the following day, gaining a comfortable 3–0 win. France's final match, against Chile, featured the first
penalty kick of the World Cup. The first goalkeeper to save a penalty was Thépot of France on 19 July 1930, saving from Chile's
Carlos Vidal in the 30th minute of the match. In Argentina's second match, against Mexico, three penalty kicks were awarded. During the same match on 19 July 1930, Mexico's
Óscar Bonfiglio saved another penalty in the 23rd minute of the match against Argentina's
Fernando Paternoster. as Argentina won 6–3, despite the absence of their captain
Manuel Ferreira, who had returned to Buenos Aires to take a law exam. Qualification was decided by the group's final match, contested by Argentina and Chile, who had beaten France and Mexico, respectively. The game was marred by a brawl sparked by a foul on
Arturo Torres by Monti.
Group 2 The second group contained Brazil, Bolivia, and Yugoslavia. Brazil, the group seeds, were expected to progress, but in the group's opening match, unexpectedly lost 2–1 to Yugoslavia. Going into the tournament Bolivia had never previously won an international match. For their opener they paid tribute to the hosts by wearing shirts each emblazoned with a single letter, spelling "Viva Uruguay" as the team lined up. Against Brazil, when both teams had only pride to play for, the score was 1–0 to Brazil at half-time. Brazil added three more in the second half, two of them scored by the multi-sportsman
Preguinho. Yugoslavia qualified for the semi-finals. Due to construction delays at Estadio Centenario, Uruguay's first match was not played until five days into the tournament. The first to be held at the Centenario, it was preceded by a ceremony in honour of the Uruguayan centenary celebrations. The Uruguayan team spent the four weeks preceding the match in a training camp, at which strict discipline was exercised. Goalkeeper
Andrés Mazali was dropped from the squad for breaking a curfew to visit his wife. One hundred years from the day of the creation of Uruguay's first constitution, the hosts won a tight match against Peru. The result was viewed as a poor performance by the Uruguayan press. Performance of the Peruvian goalkeeper
Jorge Pardon drew particular praise from neutral observers. The group's second match, played in windy conditions, witnessed the first tournament
hat-trick, scored by
Bert Patenaude of the United States against
Paraguay. Until 10 November 2006, the first hat-trick that FIFA acknowledged had been scored by Stábile of Argentina, two days after Patenaude; however, in 2006 FIFA announced that Patenaude's claim to being the first hat-trick scorer was valid, as a goal previously assigned to teammate
Tom Florie was reattributed to Patenaude. With the United States having secured qualification, the final match in the group was a
dead rubber. Paraguay beat Belgium by a 1–0 margin. A Monti goal halfway through the first half gave Argentina a 1–0 half-time lead. In the second half, the strength of the United States team was overwhelmed by the pace of the Argentinian attacks, the match finishing 6–1 to Argentina. Accounts differ as to whether a match for third place was originally scheduled. According to a 2009 book by Hyder Jawad, Yugoslavia refused to play a match for third place because they were upset with the refereeing in their semi-final against Uruguay. At the end of the championship, the captains of the United States team (
Tom Florie) and Yugoslavia (
Milutin Ivković) both received bronze medals. Yet a FIFA technical committee report on the
1986 World Cup included full retrospective rankings of all teams at all previous World Cup finals; this report ranked the United States third and Yugoslavia fourth, due to a better goal difference on otherwise identical records, a practice since continued by FIFA. In 2010, the son of Kosta Hadži, the chief of the Yugoslav delegation at the 1930 World Cup and the vice-president of the
Football Association of Yugoslavia at the time, claimed that Yugoslavia, as a team, has been awarded one bronze medal, which has been kept by Hadži himself and his family for the following 80 years. According to this source, Yugoslavia was placed third because of the semi-final loss to the eventual champions, Uruguay. The official recording however shows the United States team claiming third place.
Final The resounding wins for Uruguay and Argentina in the semi-finals meant the final was a repeat of the matchup in the
1928 Olympic final, which Uruguay had won 2–1 after a replay. The final was played at the
Estadio Centenario on 30 July. Feelings ran high around the
La Plata Basin as the Argentine supporters crossed the river with the war cry
Victoria o muerte ("victory or death"), dispelling any uncertainty as to whether the tournament had captured the imagination of the public. The ten boats earmarked to carry Argentine fans from Buenos Aires to Montevideo proved inadequate, At the stadium, supporters were searched for weapons. The gates were opened at eight o'clock, six hours before kick-off, and by noon the ground was full, A disagreement overshadowed the build-up to the match as the teams failed to agree on who should provide the match ball, forcing FIFA to intervene and decree that the Argentine team would provide the ball for the first half and the Uruguayans would provide their own for the second. Monti played for Argentina despite receiving death threats on the eve of the match. The referee was Belgian John Langenus. The hosts scored the opening goal through
Pablo Dorado, a low shot from a position on the right. Argentina, displaying superior passing ability, responded strongly. Within eight minutes they were back on level terms;
Carlos Peucelle received a Ferreira through-ball, beat his
marker and equalised. In the second half Uruguay gradually became ascendant. Shortly after Stábile missed a chance to score again, Uruguay attacked in numbers and
Pedro Cea scored an equaliser. The following day was declared a national holiday in Uruguay;
Francisco Varallo (who played as a forward for Argentina) was the last player in the final to die, on 30 August 2010. France, Yugoslavia and the United States all played
friendlies in South America following the competition. Brazil played France on 1 August, Yugoslavia on 10 August and the United States on 17 August, while Argentina hosted Yugoslavia on 3 August. Uruguay's aggregate goal difference of +12 over four games, at an average of +3 per match, remains the highest average goal difference per match of any World Cup champion and the second-highest of any World Cup finals participant, after Hungary in
1954. ==Group stage==