The signing ceremony began with a video showcasing Mastantuono's impressive skills and moments from his time at River Plate. Real Madrid's president, Florentino Pérez, then took the stage to welcome the young player.

"We are just a few days away from the start of a new season, and the excitement is building. We are proud to be part of the Real Madrid family, and this crest represents a sense of pride and community. We are living through a period that will be remembered as one of the most successful in our history," Pérez said.

"One of the most talented young players in the world has joined our team. Today, we welcome Franco Mastantuono on his 18th birthday. This is a special day for you and your family. We are thrilled to see you happy and ready to take on the challenge of your life," Pérez added.

Pérez also acknowledged Mastantuono's roots in Argentine football, saying, "It was at River Plate that Alfredo di Stéfano emerged, laying the foundation for what we are today. Dear Franco Mastantuono, you are now part of the long list of Argentine players who have made history at Real Madrid."

After Pérez's speech, it was Mastantuono's turn to share his thoughts. He expressed his gratitude and excitement, saying, "Thank you, Mr. President. Today is a special day for me. It's a dream come true as a player and as a person. I want to thank my loved ones, who are indispensable to me. I love them deeply and hope they can enjoy this moment as much as I do."

Mastantuono also thanked his inner circle for teaching him valuable lessons and expressed his enthusiasm for wearing the Real Madrid shirt. He concluded by saying, "Thanks to everyone at the club for giving me this opportunity. I promise to be a dedicated player and a true fan on the pitch. Hala Madrid!"