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.

[3] 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).

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.

[7][8][9] Beyond the violence, the Huracán 8–1 Peñarol (with a hat-trick by Norberto "Tucho" Méndez) on February 25, 1943,[10] was the all-time largest win of the tournament.