Real Madrid star Cristiano Ronaldo will miss their trip to Real Sociedad.
Cadena Cope says the Portugal captain will undergo a round of stem cell treatment to try and repair the damaged tissue in an attempt to get the player back to fitness in time for the return leg of the Champions League tie with Manchester City next Wednesday.
The forward missed the match against Rayo last weekend, which Real won 3-2 in extremis, and will not be available for the match this weekend against Real Sociedad at Anoeta.
Ronaldo and the club's medical staff will assess the player's fitness next Wednesday ahead of the City match and make a decision as to whether he will be able to line up for his side in the Bernabéu.