's title challenge may be slipping away but the Primera Division victors of the 2016-17 and 2017-18 seasons know what it takes to stay near the top.
coach Schelotto meanwhile is being tipped for a coaching role in America's MLS.
The second leg had to be played in the Spanish capital after it was marred by fan violence in Buenos Aires two weeks ago, when Boca
players were injured before the game after River fans attacked the team bus with rocks, bottles and wood.
But River, who also came back twice in the 2-2 draw in the first leg at Boca
's Bombonera stadium, levelled in the 68th minute through striker Lucas Pratto after a superb team move.
The first leg finished 2-2 and Dario Benedetto put Boca
ahead last night.
After a tight first half the deadlock was broken just before half time when Dario Benedetto's assured finish put Boca
Because for pretty much the last 10 minutes of extra-time, Boca
goalkeeper Esteban Andrada decided that he was going to take matters into his own hands.
want River Plate disqualified from the competition and asked for the match to be put back while the Court of Arbitration for Sport considered its decision.
The first leg of the South American equivalent of the Champions League final ended in a 2-2 draw at Boca
's La Bombonera home last month.
players, including Carlos Tevez, were left injured by shards of broken glass and affected by tear gas fired by police to disperse the crowd outside River's stadium Governing body CONMEBOL rejected Boca
's appeal to get the trophy without playing.