His annual net salary is set at 3.5 million Euro and the club has set a 1 billion Euro release clause to secure his future. 

Just last week, Mastantuono (মাস্তান্তু-য়োনো) became the youngest player to debut in Argentina’s top flight.

Now, he’s heading to Spain after Real Madrid activated his release clause at River Plate. 

The Argentine club confirmed that the deal totals 63.2 million Euro, with 45 million Euro net going directly to the club after taxes and other costs.