Sebastián Ignacio Martínez Muñoz (born 6 June 1993) is a Chilean footballer who plays as a midfielder for Deportes Concepción.

Career He debuted on 22 October 2011, in a 1–1 draw of Universidad de Chile against Palestino for the 2011 Torneo Clausura, replacing Gabriel Vargas in the halftime.

In January 2024, Martínez signed with Universidad de Concepción from Santiago Wanderers. In the second half of the same year, he switched to Deportes Concepción.

Personal life He is the younger brother of Christian Martínez, also a product of the Universidad de Chile youth system.

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