Born in
São Paulo, Aznar represented the youth categories of
Corinthians and
Taboão da Serra before joining
Hellas Verona in January 2019, after a trial period. On 29 July 2021, after finishing his formation, he signed a two-year contract with
Cádiz CF, being initially assigned to
the reserves in
Segunda División RFEF. Initially a backup to
Juan Flere, Aznar renewed his contract with Cádiz until 2027 on 18 January 2023. He made his first team debut on 7 December, starting in a 2–1 away loss to
Arandina CF,
the season's
Copa del Rey. Aznar subsequently became an undisputed starter for the B's, and made his professional debut on 25 May 2025, playing the full 90 minutes in a 4–0
Segunda División home routing of
SD Huesca. ==References==