Mateo Retegui (born 29 April 1999) is a professional footballer who plays as a forward for Serie A club Atalanta.

His father's grandparents on one side of the family were also Italian, specifically from Genoa, while the paternal ancestors were originally Basque (the surname Retegui being from Gipuzkoa, Spain).

[5][4] He was first promoted into the club's first-team by manager Guillermo Barros Schelotto during the 2017–18 Argentine Primera División season, appearing as an unused substitute on occasions against Arsenal de Sarandí and Estudiantes in December 2017.

[16][17] Being eligible to play for Italy through descent, in February 2023 it was reported Retegui was pre-selected by Roberto Mancini to join the Azzurri team for the first UEFA Euro 2024 qualification games.

[20] He would tally again in his subsequent appearance on 26 March, netting the winner in a 2–0 win over Malta in a Euro 2024 qualifier in Ta' Qali,[21] to become the first player to score in his first two competitive matches for the national side since Pierino Prati accomplished the feat in 1968.