Midfielder Ribeiro, who has never played for Brazil, was named Player of the Year in Brazil having helped Cruzeiro to the title.
Reports in Brazil claim that United are holding meetings about the 24-year-old midfielder - but the club insist there is no such talks.
Cruzeiro's director of football Alexandre Mattos told Globo Esporte: "We have not received any offer for him so far and I we are not aware of any interest from any club.
"Everton Ribeiro will only leave the club if Cruzeiro want."
Ribeiro's agent Robson Ferreira was quick to comment on Mattos's quotes and said that he was dealing with the English giants directly.
"Cruzeiro have not received anything because I am handling the situation directly with Man United," he is quoted by Globo Esporte.
"Everton Ribeiro has just been named the best player in Brazilian Football. Man United are interested in Everton Ribeiro.
"David Moyes is impressed and I personally met a Man United official and I was impressed. Man United consider him a complete midfielder."