Mastantuono started his senior career with boyhood club River Plate in 2024. The 17-year-old became Argentina's youngest debutant in a competitive match this summer, coming off the bench as a late substitute in a 1-0 World Cup qualifying win against Chile.

Los Blancos could be in the market for another center back if they want to deploy Xabi Alonso's preferred back three next season.

Manchester United will pocket a significant bonus after Real Madrid completed the long-awaited €50 million (£42m/$57m) signing of Alvaro Carreras.

Real Madrid are close to finalising the signing of Alvaro Carreras, the 22-year-old left-back currently playing for SL Benfica.An agreement between the two clubs has been reached for the transfer,

It was only yesterday that Real Madrid lost to PSG in the FIFA Club World Cup semi-final, but 24 hours later, they look close to making their fourth signing of