Mateo Del Blanco (born 31 October 2003) is an Argentine professional footballer who plays as a left back for Unión de Santa Fe in the Argentine Primera División.
Career He came through the academy at Union de Santa Fe after joining in 2014 from Corinthians Santa Fe. Progessimg to playing for their youth and academy teams, he trained with the first team in 2022 for the first time, signing his first professional contact later that year. He made his first team debut on 11 April 2023 against Argentinos Juniors, in a 5-1 defeat.
Initially a left-sided midfielder, he transitioned into playing as a full-back, whilst still maintaining offensive skills that led to him being credited with a number of assists during the 2025 season, and his first league goal for the club against Gimnasia. Having established himself as a regular first team player; in September 2025, he signed a new three-year contract extension with the club.
