His 28-minute cameo impressed fans, and Mastantuono made history by playing his first game at Real Madrid in La Liga. Mister Chip from ESPN Deportes reports that Mastantuono became the third youngest foreign player to make his La Liga debut with Real Madrid.

Real Madrid are at risk of facing disciplinary action if new signing Franco Mastantuono plays any part of the game against Osasuna on August 19.

The Santiago Bernabéu witnessed a special moment in the opening matchday of LaLiga 2025/26: the official debut of Franco Mastantuono in a Real Madrid shirt. The 18-year-old Argentine came on in the 67th minute to replace Brahim Díaz,

Real Madrid got their 2025-26 La Liga campaign off to a winning start, but they were made to work for it, winning 1-0 at the Santiago Bernabeu against Osasuna.

Their signing of the Argentina international was a long time in the making, and many other clubs were interested too

Real Madrid's new signing Franco Mastantuono has praised Lionel Messi during his introduction. The 18-year-old Argentine signed a six-year deal with Madrid.

This article was originally published on www.si.com as Real Madrid ‘Hatch Plan’ for Franco Mastantuono in La Liga Season Opener. Franco Mastantuono might have only been unveiled in Real Madrid City just a few days ago, but the 18-year-old is reportedly in line to make his debut in a white shirt against Osasuna.

Franco Mastantuono’s potential debut with Real Madrid has sparked controversy. Registered with the B team, CENAFE warns it could lead to claims of an ineligible lineup in LaLiga.