Cagliari president Tommaso Giulini insists they won't seek to sell Nicolo Barella next month.
The likes of Tottenham, Juventus and Inter Milan are all keen on the midfielder.
The 21-year-old midfielder has already earned four senior caps for Italy after making his debut this season.
“In January we need to replace Lucas Castro, who will be out for the rest of the season," president Giulini told Sky Sport Italia.
“We must focus on finding a player who can suitably fill in and certainly not consider losing our best player mid-season."