Inter have reportedly sold Senna Miangue to Cagliari, but retained a buy-back clause for €10m.
The 20-year-old left-back had spent the last six months on loan in Sardinia, making four Serie A appearances.
According to Sky Sport Italia, Cagliari are ready to pay €3.5m for the Belgium Under-21 international.
However, Inter included a clause allowing them to buy him back at any point over the next three years for €10m.
Watch Serie A live in the UK on Premier Sports for just £9.99 per month including live LaLiga, Eredivisie, Scottish Cup Football and more. Visit: https://www.premiersports.com/subscribenow