Antônio Dumas Ramalho Esteves (28 November 1955 – 30 December 2019) was a Brazilian football player and manager.
He played for Esporte Clube Bahia, Desportiva Leônico, Santos, S.C. Olhanense and G.D. Chaves.
Dumas coached a number of teams in Brazil, and Gabon, São Tomé and Príncipe, Togo and Equatorial Guinea in Africa.
He explained in a letter sent to a Brazilian media that he was not dismissed from the Togo national team.
It was he who wanted to leave, having received the job offer from the Equatoguinean Football Federation to be the coach of its national team.