Hermes Diego Martínez (born 5 July 1992) is an Argentine professional football player who plays as a defender for Club Atlético Nueva Chicago.
Martínez made his debut appearance on 16 May 2012, turning out in the quarter-finals of the Copa Argentina against San Lorenzo in a match which ended in a 2–0 victory.
Martínez also participated in the 2012 U-20 Copa Libertadores, winning it in his first and only attempt and beating Defensor Sporting in the final.
[1] After manager Ramon Diaz made it clear that Martínez was not in his first team plans for the Torneo Inicial stage of the league campaign, he was loaned out to Sarmiento of the Primera B Nacional with whom he played 18 games.
On 22 January 2016, Martínez was unveiled as a signing for Major League Soccer side New York City FC, joining on a free transfer.