Gremio are prepared to consider offers for their gold medalist Luan.
The Daily Express says Manchester United, Liverpool and Juventus have all been credited with an interest in the 23-year-old in recent weeks.
Gremio vice-president Alberto Guerra told Sambafoot: "Every good player is targeted. If a proposal arrives, we will analyse.
"But until now, there hasn't been any contact with Gremio."
Luan has spoken to team-mate Neymar about playing in Europe as he continues to wait for an offer to come in.