The two clubs have a huge disdain for one another and River fans want to great lengths to disturb the visitors upon their arrival at El Monumental this evening.
The incident occurred three years after a Copa Libertadores last-16 tie between the same teams was abandoned at halftime after Boca fans attacked the River players with pepper spray in the tunnel.
The game between the two Buenos Aires giants was initially delayed after organisers were said to have pressed for it to go ahead. He provides coverage of professional wrestling and has interviewed some of the biggest names in the field - including the first United Kingdom interview with The Hardy Boyz after their return to WWE.
The final of the competition, South America's equivalent of Europe's Champions League, was rescheduled for Sunday at 5 p.m. local time (2000 GMT). It has also been confirmed that fans will still be allowed to attend the re-scheduled game, with a tweet from River Plate's official Twitter account translating to: "We ask all fans to keep their tickets as they will be valid for tomorrow's game which will be played at 17:00".
Meanwhile, 66,000 River Plate fans were in the stadium waiting for a match that has been one of the most anticipated in Argentine football history.
A riot policeman fires his gun after the match was postponed
It is the first time ever it has been contested by two Argentine sides.
Television pictures showed Boca players emerge from the bus, which had several broken windows, clearing their throats and with eyes streaming from the effect of the gas.
"They were throwing pepper gas, stones, everything", the Clarin website quoted Juan Carlos Crespi, a member of the Boca delegation, as saying.
At time of writing - a little after 9pm - the match still hasn't kicked off due to wild scenes at River Plate's Estadio Monumental in Buenos Aires. Argentina has a deep problem of fan violence - hence the ban on away supporters from this final - and, seemingly, a lack of political will to get to grips with it.
"There are many players who were coughing, with the feeling of needing to vomit", said Carlos Tevez.
Boca and River drew the first leg 2-2 on November 11, a game that was delayed 24 hours itself because of a waterlogged pitch at Boca's stadium.
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