Juan Sebastián Boselli Graf (born 4 December 2003) is a Uruguayan professional footballer who plays as a defender for Argentine Primera División club Estudiantes, on loan from River Plate.

[10] Boselli made his official debut with the club on 9 December against Rosario Central in the semifinals of the 2023 Copa de la Liga Profesional, but would lose on penalties.

Boselli played the whole match and was praised for his performance; River eventually won 2–0 for their 71st title.

[12] On 27 August 2024, Boselli joined fellow Argentine club Estudiantes on loan until December 2025.

[16][17] In June 2023, Boselli received his first call-up to the senior team for friendlies against Nicaragua and Cuba.