The Brazilian came close to signing with Barcelona in the summer and is now on Real's shopping list as they attempt to solve their left-back issues.
"It is too early to talk about if I'm going to leave or not next summer," said Filipe. "Things will happen when the time comes.
"It is a compliment that Real Madrid are looking at Luis Filipe. I played in the Castilla and it was a privilege. But for now I just continue working."