Real Madrid have confirmed that midfielder Sami Khedira suffered concussion during Tuesday's win over Cornella in the Copa del Rey.
The Germany international was forced off at the Santiago Bernabeu last night following a collision with an opponent.
It is unclear whether Khedira will recover in time for this weekend's visit of Celta Vigo in La Liga.
"Following the medical tests carried out on Sami Khedira by the Real Madrid doctors in the Sanitas La Moraleja hospital, the player has been diagnosed with a concussion," read an official statement from the European champions.
Madrid are currently two points clear of rivals Barcelona at the top of the La Liga table.
