Barcelona president Josep Maria Bartomeu revealed he would first speak to Real Madrid if the La Liga champions were interested in making a move for out-of-favour midfielder Isco.
Isco has been linked with a move away from the Santiago Bernabeu as he struggles for game time under head coach Santiago Solari.
The 26-year-old, who is contracted until 2022, has only made five league starts for Madrid this season, while coming off the bench 10 times.
He has been a regular in their Copa del Rey campaign, though, meaning he could come up against Barca on Wednesday.