Mastantuono recently joined Real Madrid from River Plate, and has made a strong start in the Champions League.
Di Maria, who now plays for Rosario Central in Argentina, is impressed by Mastantuono's skills and attitude, saying he has a lot of quality and is doing something special.
Di Maria notes that Mastantuono's ability to connect with his teammates quickly and take on opponents is impressive, especially considering his age.
At just 18 years old, Mastantuono is already making a name for himself at Real Madrid, and Di Maria is happy to see another Argentine player succeeding at the club.