The Copa Libertadores match between Atlético Mineiro and San Lorenzo turned violent, leaving a number of people injured, including a fan of the Argentine club who was brutally beaten by a Brazilian police officer.
In the video captured by a fan from the ground floor of the stadium, security agents can be seen trying to drive away the fans who caused trouble in the stands.
But one of the police officers took it out on one fan in particular, hitting him repeatedly in front of the stunned eyes of those present.
Atlético Mineiro beat San Lorenzo 1-0 on Tuesday with a goal from Argentine Rodrigo Battaglia and, in addition to eliminating their rival, advanced to the quarterfinals of the Copa Libertadores, where they will face Brazilian team Fluminense, the current champion of the tournament.
The Belo Horizonte team needed a victory by any score to qualify for the quarterfinals after having achieved a valuable 1-1 draw last week in their visit to San Lorenzo, and they got it by the minimum.
Their opponent in the quarter-finals will be Fluminense, who also eliminated Brazilian side Gremio on Tuesday in a penalty shoot-out (4-2) after having beaten them 2-1 in regular time.
