Overview

• Real Madrid assigned the Argentine teenager the No. 30 shirt with Castilla to keep a first-team slot open before the transfer window closes.
• Mastantuono has completed multiple training sessions at Valdebebas and is already integrated into Xabi Alonso’s immediate and long-term midfield plans.
• According to Diario AS, injuries to Jude Bellingham and Eduardo Camavinga could see the 18-year-old feature in Real Madrid’s LaLiga opener against Osasuna.
• Soccer administrator Miguel Galán warned that registering a first-team regular as a reserve could breach RFEF Articles 125 and 250, although no formal challenge has emerged.
• Argentine voices remain split on the move, with some pundits questioning his readiness and figures like Ángel Di María praising his potential.