Sergio Martínez may refer to: Sergio Martínez (boxer) (born 1975), Argentine boxer Sergio Martínez (cyclist) (1943-1979), Cuban Olympic cyclist Sergio Martínez (swimmer) (born 1936), Colombian Olympic swimmer Sergio Daniel Martínez (born 1969), Uruguayan football striker Sergio Castro Martínez (born 1941), Mexican humanitarian Sergio Martínez Ballesteros (born 1975), Spanish football defender