Marco Fabian is backing Eintracht Frankfurt teammate Jesus Vallejo to make it with Real Madrid.
The defender has spent the season on-loan in Germany this season.
"I have told him that he has everything to be a significant Madrid player in the future, he has shown me that he is a great defender," said Fabian.
"He has to go step by step just like he is doing so far. This year he has proved how he's prepared to excel in one of the most important leagues in the world."
"I think he can become a historical player for Real Madrid."