Ribeiro's agent, Robson Ferreira, has told local press that the Premier League Champions have made contact.
Ferreira revealed: ”Man Utd want him. Moyes has been impressed. I’ve already been to England and talked personally with their representative.
"In United’s opinion he’s the complete midfielder.”
He added: "It’s been an emotional season fighting for the title, and collective and personal honours. The final decision is with the player."
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