Miranda has been one of the most impressive defenders in Europe this season, with his performances helping Atletico to the top of La Liga and into the semi-finals of the Champions League.
However, Junior, who represented Brazil at the 1982 World Cup, has said that the strength of Brazil's central defence could work against the 29-year-old.
"Miranda is also an option but there aren't any vacancies with Thiago Silva and David Luiz," Junior told AS.
"Dante's there too. Miranda must fight for another spot. It's possible."