Villarreal midfielder Roger Garcia has been ruled out for six months through injury.
The former Barcelona player has ruptured his anterior cruciate ligament and requires surgery.
The 27-year-old became aware of the problem in the recent Uefa Cup game against Lazio.
On as a substitute for the final 20 minutes, Garcia was in pain after the game. Tests showed the extent of the damage which will rule him out for the rest of the season.