The film follows five supporters of Brazilian football club Atlético Mineiro in the day of the final match of the competition.

Shot in Belo Horizonte, the city in which Clube Atlético Mineiro is based and the venue of the 2013 Copa Libertadores Finals, the documentary follows five supporters of the club (a priest, a bar owner, a sports broadcaster, a musician and a retired worker) in their preparations for the final match of the competition, which Atlético went on to win in dramatic fashion.

O Dia do Galo was directed by Cris Azzi with support from Coletivo Nitro and Alicate Filmes, totalling a crew of 50 people.

In 2014, the documentary version was completed and screened in festivals,[1] and it was released in Brazilian movie theatres on 24 July 2015 (exactly two years after the day it portrays).

Pablo Villaça, film critic for Cinema em Cena, gave the film 4 stars out of 5, stating "it is less about Atlético itself than about the act of rooting [for a football team]".