As a result, several top European clubs are showing interest in signing him, including Chelsea and Manchester United.
River Plate's board member, Stefano Di Carlo, has indicated that Mastantuono will likely stay with the club until the end of the year.
In an interview, Di Carlo said that Mastantuono's future at River Plate is certain, at least until the end of the year.
Mastantuono's contract has a release clause of £42 million, and Real Madrid is also interested in his services.
