Barcelona president Sandro Rosell says that they want to make one more signing before the summer transfer window slams shut.
The Catalans made one big-money move so far this summer, snapping up Brazil star Neymar from Santos in a deal worth around 57 million euros.
Despite the acquisition, they have also sold two talents in David Villa and Thiago, who went to Atletico Madrid and Bayern Munich respectively.
The Spanish giants have been heavily linked with a move for a centre-back, with the likes of Mats Hummels, Daniel Agger and David Luiz mentioned in speculation.
Rosell has not named any specific players on their list, but admitted that they are keen to sign one more player if they get the opportunity to bag the one they want.
"We want to add one more player to our squad before the end of the transfer window," Sport quotes the Barca president as saying.
"However, it's important to acknowledge that you cannot always get the player you want as some clubs simply don't want to sell."