Real Madrid midfielder Casemiro is set for an extended spell on the sidelines after sustaining a fracture to his leg at Espanyol on Sunday.
The Brazil international was substituted in the first half of Los Blancos' 2-0 win over Periquitos, having taken a kick to his leg as he blocked a shot.
Casemiro sat out the 1-1 draw with Villarreal on Wednesday as a result, although initial scans showed serious damage. But subsequent tests carried out on Thursday revealed the extent of the problem after the swelling had subsided.
The 24-year-old is now expected to be out of action for up to two months and could potentially miss another 11 games.
JLS: "Casemiro will be out for a month after a stress fracture to his calf bone." pic.twitter.com/IZEvIZH5bl
— M.A.J (@UItraSuristic) September 22, 2016
A statement on the Spanish club's official website read: "Following tests carried out today on Casemiro at the Sanitas La Moraleja University Hospital, he has been diagnosed with a fracture to the central third of his left fibula. His recovery will continue to be assessed."
Casemiro had previously started in all three of Real's matches in La Liga this season and also featured in their UEFA Champions League group opener against Sporting CP.