Barca could overhaul their keeper stocks in the summer, with Victor Valdes and Jose Manuel Pinto both coming off contract.
Borussia Monchengladbach No1 Marc-Andre ter Stegen is expected to join Barca as a replacement for Valdes and now Caballero is being linked as cover for Pinto.
La Opinión de Málaga says Caballero is regarded highly by new Barcelona president Josep Maria Bartomeu and coach Tata Martino.
The 32 year-old has also been linked with Manchester City.
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