Torneo Internacional Nocturno Rioplatense

Participating teams played each other in a single round-robin system. The team with most points at the end of the tournament was crowned champion. That system changed in 1944 when participants were divided into two groups of five teams each, where the first of each zone qualified to play a final that decided a champion.

Clubs that contested the International Nocturno during over the years were Independiente, Racing, San Lorenzo, Newell's Old Boys, Peñarol, Nacional (all editions), Rosario Central (1936, 1938, 1944), Boca Juniors (1936, 1938, 1943), River Plate (1936, 1938, 1944), Estudiantes (LP) (1938, 1944), and Huracán (1943, 1944)

Although being a friendly competition, participating clubs attended the Torneo Internacional Nocturno with their senior squads so some of most notable footballers of Argentina and Uruguay of those times played in the tournament.

Some of those players were Francisco Varallo, Mario Boyé, Ernesto Lazzatti (Boca Juniors); Raimundo Orsi, Arsenio Erico, Vicente de la Mata, Antonio Sastre (Independiente), Bernabé Ferreyra, Carlos Peucelle, José Manuel Moreno, Angel Labruna (River Plate), Roque Máspoli, Severino Varela (Peñarol), Atilio García, Roberto Porta (Nacional), Rinaldo Martino (San Loernzo), René Pontoni (Newell's), Waldino Aguirre (Rosario Central), Manuel Pelegrina, Ricardo Infante (Estudiantes LP), and Emilio Baldonedo (Huracán).[https://www.rsssf.org/tablesi/int-noct-riopl44.html Torneo Internacional Nocturno Rioplatense - match details] on the RSSSF

The match where Nacional beat Estudiantes de La Plata 2–1 played on 19 February 1938 in La Plata remains one of the most violent matches in the history of South American football, and a clear example of the strong Rioplatense rivalry. Media that covered the match stated: "a victory from Nacional had to be avoided in any way, and we feared for the Uruguayan supporters' safety" (Uruguayan newspaper El Diario). On the other hand, Argentine magazine El Gráfico wrote: "Saturday at La Plata there were two fights, 50% to the ball, 50% to the rival players. Nobody was safe, even the referee was on the verge of being beaten".[https://salimo.uy/el-campeonato-nocturno-rioplatense-un-torneo-que-tuvo-su-rica-historia El Campeonato Nocturno Rioplatense, un torneo que tuvo su rica historia] by Martín Perez - Feb 19, 2020 on Salimo.uy

It was revealed that there were armed persons at the stadium, and some of those people would have shown their guns near the lockers during the halftime. After being noticed of that, Nacional captain Ricardo Faccio encouraged his teammates to win the match "for us and for our families". Atilio García scored two goals (the second one with his shirt covered on his own blood after he had been injured) for the final win over Estudiantes. Because of that, the match (attended by 20,000) remained on records as "the match of the blooded shirts".[https://www.elobservador.com.uy/nota/contra-estudiantes-hazanas-desazon-y-trampa-2018523500 Contra Estudiantes: Hazaña, desazón y trampa] on El Observador by Juan J. Díaz – 23 May 2018

Beyond the violence, the Huracán 8–1 Peñarol (with a hat-trick by Norberto "Tucho" Méndez) on February 25, 1943,[https://www.globopedia.com.ar/2010/04/historia-1943.html Temporada 1943] on Globopedia was the all-time largest win of the tournament.

{{small|* Champion {{colorbox|#ccffcc|border=silver}} }}

File:Nacional equipo 1938.jpg

;Top scorers

File:Newells v nacional 1943.jpg

;Group A

;Group B

;Group A first place playoff

{{small|* {{colorbox|#D0E7FF|border=silver}} Winner of the series }}

;Final

• Torneos de Verano (Argentina)

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{{Friendly association football tournaments in South America}}

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