Sanz's early work was influenced by rock and pop, with his debut album "Los Chulos Son Pa' Cogellos" (1991) showcasing his raw talent. However, it was his second album "Viviendo Deprisa" (1991) that brought him moderate success. His breakthrough came with the album "3" (1995), which included the hit single "La Fuerza del Corazón." This album marked a turning point in his career, as he began to explore more mature and introspective themes.