During the Brasileirão match at Maracanã, already trailing 2-0, Allan was shown a yellow card for slapping Lucho Acosta's arm near the touchline. As the situation escalated, the midfielder made an obscene gesture while arguing with Fluminense staff, resulting in his dismissal.
The incident occurred after halftime as Corinthians struggled to get back into the game. The referee initially showed only yellow cards to both Allan and Acosta for the initial scuffle before upgrading to a red card for the Corinthians player's gesture.