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A 17-year-old player was left badly injured as a result of the shocking scenes following Boca Juniors' Copa Libertadores defeat to Atletico Mineiro on Tuesday night.
And it took a negotiation with Mineiro's president to prevent a number of Boca players from being arrested for their part in the shameful violence that took place.
After a bad-tempered tie ended 0-0 over two legs, Brazilian side Mineiro eventually defeated Boca 3-1 in a penalty shoot-out in Belo Horizonte.
But Boca were left furious after they had two goals disallowed by VAR, one of which looked especially harsh after it judged their forward to be in an offside position.
Atletico Mineiro player Savio was left with a bloody nose
Boca's players reacted badly after the game, and attempted to storm the Mineiro dressing room, where it is thought the match officials had taken refuge.
Former Manchester United defender Marcos Rojo was among the thick of it, and was seen at one stage brandishing a fire extinguisher.
The police eventually got involved, firing tear gas at the Boca players in an attempt to disperse them.
But that did not prevent them seemingly seriously injuring Mineiro's 17-year-old forward Savio, with pictures of him with a bleeding nose doing the rounds on social media in the aftermath.
Luis Figo lifts lid on talks with Florentino Perez following audio leaks
Marcos Rojo and Boca Juniors players storm opposition dressing room in chaotic scenes
Such was the severity of the chaos that at one stage Brazilian police were believed to be seeking to arrest at least three of the Boca players.
But a statement released on Mineiro's official Twitter account read: "After a long negotiation, brokered by President Sérgio Coelho, the Argentine delegation went to the police station to register an incident report for depredation of property and aggression. Nobody will be detained.
Things got out of hand after Boca Juniors lost a penalty shoot-out
(Image: [email protected])
"The balance of injured people was, fortunately not serious. There was even an attempt to attack Atlético's football director, Rodrigo Caetano, with an iron bar.
"On the way, they attacked everyone they came across, in addition to breaking drinking fountains and guardrails. The police arrived after some time and drove off the attackers with pepper spray."
It was an unsavoury end to the tie, and when asked whether refereeing had been a factor in their elimination Boca midfielder Diego Gonzalez told reporters after the game: "Without a doubt, everyone can see that.
"We scored a good goal, and the fact is that we deserved to win the first game as well.
"This hurts, we feel bad. CONMEBOL [the South American Football Confederation] need to look at the refereeing."