Mascherano has a personal connection to Mastantuono, as he previously coached him while serving as the Argentina U20 coach. He believes that Mastantuono possesses many qualities that will enable him to succeed in Europe, including a strong mentality and a high level of skill.

When asked about Mastantuono's decision to join Real Madrid, Mascherano noted that it is a difficult choice for any young player to turn down an opportunity to play for one of the world's top teams. However, he is confident that Mastantuono has the potential to maintain his level of performance and demonstrate his value to Real Madrid.