Brazilian reports claim Milan made an offer of €10m plus bonuses for Gremio right-back Vanderson, but were told he is not on the market.
UOL Esporte in Brazil maintain the proposal arrived for the 20-year-old defender, who had also been linked with Arsenal over the summer.
However, Gremio refused to even discuss the situation, insisting he is not for sale.
They believe his transfer value will grow much more over the course of 2021.
Vanderson has a contract until 2025 and a release clause worth €100m, so Gremio are under absolutely no pressure to sell.
He is a product of the Gremio youth academy and only signed this new contract in June.
— Jeremias Wernek (@jeremiaswernek) August 18, 2021