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, receiving a standing ovation from fans who see him as one of the club’s brightest future stars.

A long-awaited debut amid regulatory controversy

Mastantuono’s first appearance didn’t come without controversy. The attacking midfielder wore the number 30 shirt, usually reserved for Castilla players, sparking debate over registration rules and whether it could be interpreted as an ineligible lineup. However, the club defended its decision as being within regulations, allowing the Argentine to enjoy his first official minutes with the senior team.

Signed on August 14 — his 18th birthday — in a deal worth around €60 million, Mastantuono arrived at the Bernabéu carrying the tag of a potential superstar. The expectations were sky-high, and his debut in an official match only raised the excitement of Madridistas even further.

Mbappé decisive on the scoresheet

The clash with Osasuna, managed by Alessio Lisci, was decided by a penalty converted by Kylian Mbappé in the 51st minute. The Frenchman opened his season account while wearing the iconic number 10 for the first time in Madrid’s history.

Although the spot-kick was surrounded by controversy — with Juan Cruz fiercely protesting the referee’s decision — the goal ignited the Bernabéu. For Mbappé it was a symbolic first strike, while for Mastantuono it meant debuting in a match full of tension and emotion.

Xabi Alonso’s bet on youth

Coach Xabi Alonso made it clear the Argentine is part of his short-term plans. “He has personality, quality, and a special left foot. We want him to adapt quickly and understand what it means to play for this club,” he said ahead of the game.

Mastantuono’s debut symbolizes the start of a new cycle at Real Madrid: blending superstar signings like Mbappé with young talents destined to define an era. The excitement at the Bernabéu is undeniable, and while the Argentine only played just over 20 minutes, the message was clear — the future begins now.