Flamengo fans celebrating their side's triumph in the Copa Libertadores clashed with riot police on the streets of Rio de Janeiro on Sunday.
Fighting broke out between rival fans in the stands following a Brazilian top-flight match between Cruzeiro and Atletico Mineiro on Sunday.
Nautico and Fortaleza fans clashed ahead of their Copa do Nordeste match on Tuesday night.
Flamengo fans fought among themselves in the stands at the Morumbi Stadium during half-time of their match against Sao Paulo on Sunday.
Vasco da Gama fans have clashed with military police at the Estadio Sao Januario following their 1-0 defeat to arch-rivals Flamengo in Brazil's Serie A.
Goiás and Vila Nova fans clashed in the stands after the final whistle of their Serie B match at the Estádio Serra Dourada in Goiânia, Brazil on Saturday.
Gama and Brasiliense fans clashed on the pitch during Sunday's match at the Estádio Walmir Campelo Bezerra in the city of Gama.
Corinthians fans fought with police in the stands before kick-off.
Fans of Clube de Regatas Brasil and bitter rivals Centro Sportivo Alagoano clashed violently after the final whistle.
Fortaleza and Sport Recife fans clashed during the half-time.
Sao Paulo fans clashed with police during an Under-20 match at the Nogueirao stadium in Mogi das Cruzes on Sunday.