Conmebol has confirmed that the postponed second leg of the Copa Libertadores final between River Plate and Boca Juniors will be played at the Bernabéu stadium, more than 6,000 miles away from the original venue, on 9 December.
Fans of both sides will be given an equal allocation of tickets.
Argentina’s two biggest teams drew the first leg 2-2 at Boca’s ground and were due to play the second match in South America’s equivalent of the Champions League final at River’s El Monumental stadium on Saturday. However, three Boca players, including the former Manchester City and Manchester United striker Carlos Tevez, were left needing medical attention when River fans attacked Boca’s bus as it approached the stadium and the game was delayed until Sunday and then postponed indefinitely.
Thursday’s decision to play the second leg in Madrid came after Conmebol’s meeting in Asunción on Tuesday.
The South American confederation also confirmed that River will be fined $400,000 (£310,000) and have their ground closed for two games.