Nicolás Agustín Demartini (born 4 November 1999) is an Argentine professional footballer who plays as a centre-back for who currently plays for the Barracas Central, on loan from Temperley.
Club career Demartini started his career with Temperley. Gastón Esmerado promoted the defender into the club's first-team squad during the 2017–18 Primera División campaign, making appearances against Newell's Old Boys, Chacarita Juniors and Patronato from February 2018 as they were relegated; his only previous experience in senior football was as an unused substitute in the Copa Argentina versus Defensa y Justicia in August 2017. In Primera B Nacional, the second tier, Demartini started and finished the opening twenty fixtures of 2018–19, while also netting his first goal during a 2–3 home defeat to Arsenal de Sarandí on 23 September 2018.
On 15 March 2021, Demartini joined Chilean Primera División club Antofagasta on a loan deal for the rest of 2021. In January 2022, he was loaned out once again, this time to Argentine Primera División club Tigre until the end of the year.
International career In 2018, Demartini represented Argentina's U19s at the South American Games in Bolivia; as they finished fourth. A year later, Demartini was selected for the 2019 Pan American Games with the U23s in Peru. Just one appearance followed, though it occurred in the tournament's final against Honduras as Argentina won the trophy.
