Due to a clause in his contract, Reinier would have been able to leave Flamengo for free next summer, meaning that the Copa Libertadores champions had no choice but to let him go.
According to Diario AS, Real's medical team are in Brazil to oversee Reinier's medical today.
The player will then officially sign a six-and-a-half-year contract on his 18th birthday on January 19.
The La Liga side employed the same technique when capturing Vinicius Junior from Flamengo, signing the forward before he turned 18 to avoid competition from other clubs. body check tags ::