Mastantuono, 17, is with River in the United States for the Club World Cup, and will join Madrid in August. ESPN previously reported that Madrid were close to completing a deal for the teenage playmaker,

Real Madrid have completed the signing of Franco Mastantuono from River Plate. The 17-year-old will sign a six-year deal at the Spanish champions, joining the club officially on August 14, before River Plate’s Copa Libertadores last-16 tie against Libertad.

Mastantuono agreed to a six-year deal at the Bernabeu, with Madrid staving off interest from Paris Saint-Germain, Manchester United and Chelsea to win the youngster’s signature. River had aimed to keep him at the club until the end of 2025 – after the end of their domestic season – but have now reached an agreement with the European giants.