General Brazilian
campeonato de futebol adulto
Most common usage across Brazil
São Paulo
campeonato de futebol adulto / campeonato profissional
Often refers to professional leagues like Paulista Championship
Rio de Janeiro
campeonato de futebol adulto
Standard usage, may reference Carioca Championship
Portugal
campeonato de futebol de adultos / campeonato sénior
Portuguese uses 'sénior' for adult-level competitions