Daniele De Rossi scored on his Boca Juniors debut but the Argentine powerhouse suffered a shock penalty shoot-out defeat to Almagro.
De Rossi made a dream start to life at Boca after leaving boyhood club Roma, marking his bow with the 28th-minute opener on Tuesday.
The 36-year-old s bullet header at Estadio Ciudad de La Plata had three-time Copa champions Boca on track to advance to the round of 16.
However, when De Rossi was substituted with 13 minutes remaining, Boca lost control against the second-tier side.
Ya se juega el segundo tiempo en La Plata. 1 Almagro 0.
— Boca Jrs. Oficial (@BocaJrsOficial)
Juan Martinez equalised for Almagro within five minutes of former Italy international De Rossi s exit as the match went to extra time.
De Rossi then watched from the sidelines as Boca – winners in 2014-15 – were stunned 3-1 in the shoot-out.
Boca igualó 1-1 con Almagro pero perdió en la definición por penales y quedó eliminado de la Copa Argentina. De Rossi anotó el gol Xeneize en el tiempo reglamentario del partido jugado en La Plata.
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— Boca Jrs. Oficial (@BocaJrsOficial)
Afterwards, Boca forward Ramon Abila told reporters: It bothers me to lose, but we apologise to the people of Boca.
