An ambush set by waiting Millonarios fans and the firing of tear gas from police left several visiting players needing emergency treatment
The Copa Libertadores final second leg was suspended in farcical circumstances after Boca Juniors' team bus was left almost destroyed and two players sent to hospital following an ambush by River Plate fans.
The clash between River and Boca at the Monumental looked to go ahead as late as two and a half hours after the original kick-off time, before CONMEBOL finally opted to reschedule amid widespread confusion and conflicting reports.
Tensions have been high around the Argentine capital Buenos Aires for weeks since it was confirmed that the two arch-rivals would meet in a two-legged decider.