They are impressed with the 17-year-old midfielder's skills and maturity.
According to Paredes, Mastantuono already shows great maturity, considering his age.
He believes that Mastantuono has incredible quality and a strong personality.
Dybala agrees that playing at a high level at such a young age is a remarkable achievement.
Mastantuono will remain at River until August 14, when he turns 18, before officially joining Real Madrid.
