Cagliari are said to have offered €3m for Gremio defender Werley Ananias da Silva.
According to Cagliarinews24, an initial €1.5m proposal was rejected by the Brazilian club.
However, Gremio would be prepared to listen for double that figure.
At the same time, the Sardinians are discussing personal terms with Werley’s entourage.
The 25-year-old centre-back also had spells at Atletico Mineiro.