Fiorentina have officially confirmed the signing of teenage Real Madrid prospect Franco Mastantuono on a season-long loan deal.

The 18-year-old Mastantuono arrives at Fiorentina on a straightforward loan agreement. The deal does not contain an option to buy or an obligation to buy, and there is also no automatic extension of the loan if La Viola qualify for Europe this season, despite reports earlier this week suggesting otherwise.

Mastantuono is the youngest player ever to represent Argentina at senior level, having made his debut under Lionel Scaloni last summer at the age of 17 years and 296 days. In doing so, he broke a record that had stood for well over 100 years, going back to Adolfo Heisinger in 1916.

The Albiceleste teenager made his first-team debut for River Plate at the age of 16 and then scored 10 goals in 64 competitive appearances in his home country of Argentina before sealing a €45m move to Real Madrid last summer.

Since then, he has made 35 appearances in all competitions for Madrid, including eight matches in the Champions League.

"ACF Fiorentina announces that it has acquired, on a temporary basis, the sporting rights to the footballer Franco Mastantuono from Real Madrid," a statement on the club website said.

"Mastantuono, born in Azul on August 14, 2007, came through the youth system at River Plate and made his first-team debut at the age of 16. After that, he registered 64 appearances and 10 goals in the River shirt.

"During last season, the new Viola player made 35 appearances for Real Madrid across LaLiga, the Champions League, Copa del Rey and the Spanish Super Cup, scoring three goals.

"Mastantuono is the youngest player to have made his debut for the Argentina senior national team and has worn the Albiceleste shirt on four occasions."