Players and staff were left rubbing their eyes after police fired tear gas at protesters ahead of Wednesday's Libertadores match in Barranquilla.
After their Copa Sudamericana win and first ever continental trophy, Atletico Paranaense have eyes on joining the traditional Brazilian powerhouses.
Brazilian club Atletico Paranaense needed extra time and penalties to secure their first ever continental title over Colombian squad Junior.
Colombian side Atletico Junior and Atletico Paranaense of Brazil ended level 1-1 in Wednesday's first leg of the Copa Sudamericana final.
You could be forgiven for not knowing that the Copa Sudamericana final is upon us; Junior of Colombia and Atletico Paranaense of Brazil meet.
While the Copa Libertadores highlights an all-Argentina final, the Copa Sudamericana semifinals feature teams from Brazil and Colombia.
The incident left a player and two members of the backroom staff injured, the league said in a statement.
It may only be the Copa Sudamericana, but the fact that four Colombian clubs are in quarterfinals shows they are a sleeping giant, writes Tim Vickery.
Just days after the Copa Libertadores finished, South American have now turned their attention to the Copa Sudamericana, writes Tim Vickery.