Alfonso Montero Benia (born 23 February 2007) is an Uruguayan footballer who plays as a defender for the under-20 (Campionato Primavera 1) team of club Juventus.
Montero was born in Montevideo, Uruguay to former Uruguay international footballer Paolo Montero. He is the grandson of fellow Uruguayan international Julio Montero Castillo.
Montero began his career with local Montevideo-based side La Escalinata before joining professional club Defensor Sporting at the end of the 2020 season. In February 2023, Montero moved to Italian Serie A club Juventus, the club his father had captained during his time as a player. In September of the same year, he signed his first professional contract, keeping him with the club until 2026.
At the age of sixteen, he made his debut for Juventus' Primavera (under-19) side, featuring in a 1âÂÂ1 draw against Lazio in February 2024. On 15 October 2024, he was named by English newspaper The Guardian as one of the best players born in 2007 worldwide.
Montero was called up to the Uruguay under-17 side for the first time in August 2022. He was called up again for the 2023 South American U-17 Championship, though did not feature as Uruguay were knocked out in the first stage.
In January 2025, Montero was named in Uruguay's 23-man squad for the 2025 South American U-20 Championship.