Celta Vigo president Carlos Mourino admits they want to keep hold of Rafinha.
The midfielder spent the past season on-loan at Celta from Barcelona.
Mourino commented: “He is a player we want to have, but he belongs to Barcelona and now they are the ones who must move.
"Today it does not depend on us and as things are, it is very difficult for there to be movements in the coming days."
Mourino also revealed offers have flooded in for winger Pione Sisto.
He added: “At the moment there is an offer that seems small to us, but we are going to continue fighting. He had millionaire offers to go to play in other countries, which paid him five times more, and he did not want to go. There was even a team that gave him the shirt with his name on it and he didn't want to go."