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Clashes between rival fans began in the land surrounding Boca's La Bonbonera (Chocolate Box) Stadium, where soccer-based hooligans known as Barras Bravas (Fight Clubs) meet.
Boca's soccer team traveled to the Argentinos Juniors ground in Argentine capital Buenos Aires to play Huracan for the Closing-Tournament sixth-round match. The hooligans used guns and knifes during their fight.
The malicious wounding incident came as Argentine police offered a 32,000-dollar reward for information to solve a soccer-related murder that took place Saturday. Emanuel Alvarez, 21 and a fan of Velez Sarsfield, was shot dead on his way to a Velez-San Lorenzo match.
Riots following the news of Alvarez's killing caused the cancellation of the Saturday match. In June last year, one fan died and 14 were injured in clashes between fans of clubs Nueva Chicago and Tigre.
On Sunday, soccer matches across the nation held a one-minute silence to mark Alvarez's death, the 223rd death that has occurred since Argentine began keeping records on soccer-linked deaths in 1939.