 His final match for the club was on 29 May against Colo-Colo, in which he scored in the 2–0 victory.Unión La Calera were 3rd place in the league at the time of Fernández's departure to Mexico.On 7 June 2018, Liga MX club Necaxa confirmed the signing of Fernández on a three-year contract from Racing for a reported $3 million.