Mastantuono stated that he is "very happy" to be a part of Real Madrid, as he had always dreamed of playing for the team. He also expressed his gratitude to the fans for their warm welcome and affection since his arrival. The player had initially set his mind on River when he found out about the transfer, but he is now thrilled to be a part of Real Madrid.

When asked to describe himself as a footballer, Mastantuono said that he is an offensive player who is left-footed but often plays on the right side. He prefers to let others describe him, but he is certain that he will give his all to help the team.

Mastantuono also mentioned that he received a call from Xabi Alonso, which gave him confidence. This is particularly notable as Mastantuono is the 13th player to have played for both River and Madrid, a rare feat in football.

When asked about his opinion on Lionel Messi, Mastantuono stated that he thinks Messi is the best player in the world. However, he also emphasized that Real Madrid is the biggest team in the world, and he is excited to make his own mark on the team.

Mastantuono acknowledged the media attention that comes with being a football player, particularly at a team like Real Madrid. He stated that he handles the exposure calmly and sincerely, just as he does in his personal life.

When asked about his favorite memory of Real Madrid, Mastantuono mentioned that he saw them win several Champions League titles. He also expressed his gratitude for the opportunity to play for the team on his birthday, which he described as a unique and special experience.

Mastantuono has already met some of his new teammates, including Jude Bellingham, whom he followed from Argentina. He also mentioned that he was a bit anxious during the days when he couldn't train due to the transfer process.

Mastantuono was also able to keep his jersey number 30, which he had previously worn at River. He mentioned that he asked the president if he could continue to wear the number, and he was pleased that he was able to do so.

Mastantuono also spoke about the interest from other teams, including PSG, but he ultimately chose to join Real Madrid. He expressed his gratitude to Luis Enrique for being clear with him about the team's intentions.

Finally, Mastantuono reiterated that his childhood hero and the best player in the world is Lionel Messi, whom he thinks is the greatest player of all time.

Mastantuono also shared that he started playing football at a young age and decided to focus on it when he had the opportunity to join River. His parents supported his dream, and he is grateful for their encouragement.