Diego Andrés Monreal Villablanca (born 5 September 2002) is a Chilean footballer who plays as a centre-back for Chilean Primera División side Audax Italiano.
A product of the Audax Italiano youth system, Monreal made his senior debut in the 3âÂÂ1 away loss against Everton for the Chilean Primera División on 28 February 2023 and scored his first goal in the 2âÂÂ1 win against Deportes Rengo on 22 June of the same year for the Copa Chile. In the same year, he also took part in the Copa Sudamericana. During the 2025 Liga de Primera, he played on loan for Unión La Calera.
In August 2023, Monreal took part in a training microcyle of Chile U23 under Eduardo Berizzo with views to the 2023 Pan American Games.
Diego is the brother of the footballers Sebastián and Josepablo Monreal.