Madrid: Real Madrid right-back Dani Carvajal could be out for up to a month.

“After tests performed on Dani Carvajal ... he has been diagnosed with a grade two injury in the right hamstring muscle,” Madrid said in a statement.

As well as the Copa del Rey semi-finals, should Madrid overcome a 2-1 quarter-final, first leg deficit against Celta Vigo sustained on Wednesday night, Carvajal is expected to miss La Liga games against Malaga, Real Sociedad, Celta and Osasuna.

Carvajal is also now a major doubt for Real’s Champions League last 16, first leg clash with Napoli at the Santiago Bernabeu.