Mascherano has a close relationship with Mastantuono, as he coached him when he was the coach of the Argentina U20 national team.

According to Mascherano, Mastantuono is taking a significant step in his career by joining Real Madrid.

He notes that playing for a top team like Real Madrid is a big opportunity, and it's not easy to turn down when bigger clubs come calling.

Mascherano also spoke highly of Mastantuono's skills and mentality, saying he has all the qualities needed to succeed in Europe.

However, he emphasizes that it's ultimately up to Mastantuono to maintain his level and prove his value over time.