The former River Plate midfielder moved to Real Madrid last summer, but has struggled to establish in their midfield.
For Alonso, Mastantuno lack of regular action risks damaging his career before it really gets started. Under coach Alvaro Arbeloa, the youngster came on in the 82nd minute against Valencia and then disappeared from the scene: not a single minute against Real Sociedad, nor against Benfica in the Champions League, nor against Osasuna in the last matchday.
Alonso said on Fedi Rubi's YouTube channel: : "They're tearing him apart.
"You know why? I think that kid is going to end up at a lower-league team.
"Then, maybe he'll come back to Real Madrid, but first he has to prove he's good enough for Real Madrid."
