While it was always expected that the second-leg of tonight's Copa Libertadores final would be a fiery affair, River vs Boca has been postponed following the attack of the former team's bus on arrival at the stadium.
In others, Boca players were being attended to by medical staff in their dressing room at River's Monumental stadium in the upmarket Nunez neighborhood of Buenos Aires.
Boca chairman Daniel Angelici had requested the second leg be suspended but CONMEBOL instead announced it would be played after a delay.
The mood had seemed excited and expectant as River fans descended on the Stadio Monumental, while Boca fans, thanks to the ban on away fans in Argentina, made for their home ground, La Bombonera, eight miles away, to watch on a giant screen. The bus was then subjected to a hail of objects, which succeeded in breaking at least three windows. River fans clashed with police outside the stadium as tear gas and rubber bullets were fired.
Boca were saying they are in no position to play the game due to the injured parties needing medical treatment at hospital - however it looks like they have been forced to play.
Copa Libertadores final hit by pre-match violence
Carlos Tevez beleived that his teammates were in no condition to play.
Local television stations said some players suffered cuts from the broken glass.
Footage taken before the match was scheduled to start appeared to show a young girl having flares taped to her body beneath her clothing in an apparent attempt to get them past security. Federation Internationale de Football Association boss Gianni Infantino reportedly even told Boca they would be disqualified if they refused to play.
CONMEBOL initially postponed the match until 6 p.m. local time Saturday; kickoff was pushed back again, to 7:15 p.m., before the announcement was made that the game would take place on Sunday. Had River won, Boca would surely have appealed against the result and in the circumstances, it would have been hard for anybody to concentrate on the actual game. We don't have a leg to stand on: if we have to play, we are going to play.
The match has been rescheduled for Sunday and will kick off at 5pm local time (8pm GMT). The damage, though, to the spectacle and to the reputation of Argentinian football had already been done.
"The team which loses will carry a cross for the rest of their life", was how Marcelo Matador Salas, the Chilean striker who used to play for River and Lazio, described it.More news: Justin & Hailey Bieber Celebrate First Thanksgiving Together!
More news: 'Prince William tried to save my drowning son'
More news: Kevin Durant calls heckling 'corny' and 'weak'