Born in Concepción, Bío-Bío Region, Sanhueza started his career at hometown club Fernández Vial before moving to Everton, where he would spend an entire season in the team of Viña del Mar.
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The next season, Sanhueza made his international debut in the Copa Libertadores, in where he was member of the historic 1–0 home victory over Boca Juniors at Valparaíso and of the also important tie with the same team at La Bombonera.
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In November 2012, the web site of newspaper La Cuarta compared him with club's historic defensive midfielder Arturo Sanhueza.