Real Madrid goalkeeper Keylor Navas missed Costa Rica's game on Tuesday because of a problem he picked up on Sunday in his country's game against Honduras.
He returned to Madrid on Monday, therefore, and underwent tests with the club revealing on Tuesday that he has a problem with his adductor muscle.
"After the tests carried out this afternoon on our player, Keylor Navas, at the Sanitas La Moraleja University Hospital, he has been diagnosed with a swollen adductor muscle in his right groin," a statement read. "His recovery will continue to be assessed."
Navas, who helped Costa Rica qualify for the World Cup, will therefore miss this weekend's game against Getafe and is a major doubt for the Champions League game against Tottenham on Tuesday.
With Navas missing, Zinedine Zidane will turn to former Espanyol stopper Kiko Casilla.