Spanish newspaper Sport claim Barcelona could look to Serie A for defensive reinforcements, including Federico Fazio, German Pezzella and Mateo Musacchio.
The Blaugrana want a low-cost and experienced option to bolster their ranks in the January transfer window following injury problems.
According to Sport, Antonio Rudiger of Chelsea is the hot favourite, as he has no real role at Stamford Bridge now.
Other candidates come from Serie A, with Fazio falling down the pecking order at Roma and Pezzella a more expensive target at Fiorentina.
Musacchio is another potential pick, but the Milan centre-back has barely played over the last year due to injuries.