Barcelona are tracking Liverpool defender Dan Agger.
The Sun says the Spanish giants want a centre-back who fits their style of building attacks from the back.
Barca know Carles Puyol, 34, and Eric Abidal, 33, are coming to the end of their glittering careers.
La Liga leaders Barcelona sniffed around Agger, 28, in the summer when Manchester City had a £20million bid rejected.