The Catalan club, who sold star man Neymar for a world-record fee to Paris Saint-Germain in the summer, failed to sign the Brazilian in the summer.
The playmaker reportedly handed in a transfer request at Anfield, though Jurgen Klopp and the club’s chiefs stood firm, keeping him at the club.
“We are ready to sign Coutinho or any other player the technical staff request in the winter window,” he said.
“We want to have the most competitive squad possible. The club will be sustainable, we don’t want losses. If that is the case, we will look for means to generate income.”
The Spanish side signed Borussia Dortmund’s Ousmane Dembele as a replacement for Neymar, however, a hamstring injury in just his fourth game has left the Frenchman sidelined for up to four months.