Real Madrid have completed the signing of highly rated River Plate midfielder Franco Mastantuono, in a sensational deal reported to be worth €45 million plus an additional €10 million in performance-related bonuses, according to TyC Sports.

The 17-year-old Argentine sensation, widely regarded as one of the brightest young talents in South American football, has officially signed the documents to become a Los Blancos player — though a key question remains: when will he arrive in Madrid?

According to multiple sources, including renowned transfer expert Fabrizio Romano, there is still uncertainty over whether Mastantuono will link up with Real Madrid before or after the FIFA Club World Cup.

Paris Saint-Germain were also reportedly in the race for Mastantuono’s signature, but the Spanish giants moved swiftly to secure their latest Galáctico-in-the-making — continuing their trend of investing early in elite-level youth talent from South America.