Boca and River drew the first leg 2-2 on Nov. 11 but the second leg at River's Monumental stadium was postponed after Boca players were hurt when their coach was attacked by River fans as it approached the ground.
The match is now scheduled to take place in Spain on Sunday at Real Madrid’s Santiago Bernabeu stadium.
Boca based their appeal on a similar situation three years ago when they were kicked out of the Libertadores, South America's top club competition, after their fans attacked River players with pepper spray at halftime during the first leg of their last 16 showdown.
The club now had several weeks in which to prepare their case, a second official told Reuters, also on condition of anonymity.
The official said the six-time Libertadores champions would continue with the appeal regardless of what happens in Sunday's match in Madrid.
(Reporting by Ramiro Scandalo, writing by Andrew Downie; Editing by Peter Rutherford )
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