El Mundo Deportivo says with Zambrotta preparing to leave for AC Milan at the end of the season, Barca directors are making plans to find a quality replacement.
Top of their shopping list is Brazilian Daniel Alves, though Sevilla president Jose Maria del Nido's difficult bargaining tactics could prove a stumbling block. Bayern Munich pair Willy Sagnol and Philipp Lahm are also interesting the Spanish giants.
Mallorca winger Jonas Gutierrez has emerged as a surprise option. Barca's football staff have discussed the prospect of signing the Argentine and converting him into a more defensively-minded player.