Real Sociedad striker Willian Jose has opened the door to playing for Spain.

The Brazilian is on the brink of qualifying for a Spanish passport and says he would be happy to follow Diego Costa's example in switching from Brazil to playing for his adopted homeland.

"I do not have the passport yet, but when I have it, I would make myself available," he told AS.

"I am very calm, focused on Real Sociedad, scoring goals to help achieve the goals. It would be very good for me (to play for Spain)."