[3][4] The second leg was originally to be hosted by River Plate at the Estadio Monumental Antonio Vespucio Liberti in Buenos Aires, Argentina, on 24 November 2018.

However, due to safety concerns arising from an attack on the Boca Juniors team bus prior to the match, the second leg was moved outside of Argentina and South America, later confirmed to be the Santiago Bernabéu Stadium in Madrid, Spain.

As winners, they qualified as the CONMEBOL representative at the 2018 FIFA Club World Cup in the United Arab Emirates, entering in the semi-finals.

[17][18] The game was goalless until the 34th minute mark, when Ramón Ábila put Boca ahead, only for Lucas Pratto to equalise 90 seconds later.

Match rules[6] Prior to the second leg of the final on 24 November, the Boca Juniors team bus was attacked en route to River Plate's stadium, the Estadio Monumental Antonio Vespucio Liberti.

Multiple windows were broken by projectiles thrown from a crowd surrounding the bus, allowing pepper spray to enter the cabin.

Several players were injured as a result of the broken glass and pepper spray, with the match delayed by one hour to 18:00 local time.

[26] On 25 November, prior to the rescheduled second leg, Boca Juniors requested that the match be postponed in order for it to be played in "conditions of equality.

[28] On 27 November, CONMEBOL confirmed the second leg would be played outside Argentina due to safety concerns, with the match taking place on 8 or 9 December.

[29] Subsequently, on 29 November, CONMEBOL confirmed the match would take place at the Santiago Bernabéu Stadium in Madrid, Spain, on 9 December at 20:30 local time.

Additionally, River Plate were reprimanded for the bus attack, fined $400,000, and ordered to play two games behind closed doors in the Estadio Monumental.

[41] In the second half, River Plate fought back and finally equalised after another first-leg scorer, Lucas Pratto, scored in the 68th minute.