Brazil’s Neymar was shown a red card after the final whistle at the Copa America as his side were beaten by Colombia for the first time since 1991.
The Barcelona forward kicked a ball at Pablo Armero in frustration, before Colombia’s Carlos Bacca was also sent off for a retaliatory shove.
Defender Jeison Murillo had got the only goal with a close-range finish in a packed goalmouth after 36 minutes.
Brazil toiled hard, but struggled to carve out clear chances.
Colombia play Peru in their final Group C game, with Brazil taking on Venezuela. Brazil, Colombia and Venezuela are level at the top of the table with three points each.