Real Sociedad management are prepared for Alvaro Odriozola to leave in 2018.
The fullback, tied to La Real until 2022, is being tracked closely by Real Madrid.
AS says La Real accept the young defender is ready to leave over the next year, but will insist on any interested club meeting his €40m buyout clause.
Barcelona are also interested in Odriozola, though Real Madrid are regarded as the most serious.
Real could move for Odriozola in January given the virus that has struck down Dani Carvajal over the past week.