Barcelona are weighing up moves for three of the Premier League's top centre-backs, according to the Daily Mirror.
The Catalan club are reportedly interested in Arsenal's Thomas Vermaelen, Chelsea's David Luiz and Manchester City captain Vincent Kompany. New Barca boss Tito Vilanova is believed to have made Athletic Bilbao star Javi Martinez his main transfer target this summer, but the Spanish international's asking price is too high.
The La Liga giants have identified the three Premier League performers as possible replacements should they fail in their attempts to sign Martinez.
Barca have been linked with Chelsea defender David Luiz in the past, but the Blues are thought to be keen to hold on to the 25-year-old Brazil international.
Arsenal face a nervous summer, with Gunners fans already anxiously waiting for news on Robin van Persie's contract, and losing Thomas Vermaelen would be another massive blow.
Similarly, Vicent Kompany was outstanding for Manchester City, as Roberto Mancini's side won their first Premier League title. And the Italian boss is eager to avoid breaking up his burgeoning partnership with England international Joleon Lescott.
Barca are on the look-out for a centre-half as current duo Gerard Pique and Carlos Puyol experienced rough patches last season. Puyol has been troubled by injury, forcing him to miss Spain's Euro 2012 campaign, while Pique briefly fell out of favour under Pep Guardiola.