Cristiano Ronaldo is set to miss up to a month of action for Real Madrid after sustaining an ankle injury in Portugal's 3-0 win over Hungary on Saturday, according to AS.

The winger suffered a recurrence of the same ankle injury which he picked up in Real's win over Marseille in the UEFA Champions League at the Bernabeu on September 30.

There were doubts over his fitness going into this game, after he failed to make Madrid's trip to Sevilla last weekend but after a fitness test on Friday he was declared fit to play.

Ronaldo played less than half an hour of the European Group One World Cup qualifier and following an MRI scan after his return to Madrid the club have revealed that he will be out for at least three or four weeks.

"After the clinical examination and MRI scan, the player has suffered a recurrence of his injury to his right ankle. The minimum estimated [recovery] time is three to four weeks," the medical report read.

As a result Ronaldo is likely to miss two Primera Liga ties as well as both Champions League games against Milan with a trip to the Vicente Calderon to face Atletico Madrid on November 8 a possible return date for the Madrid's top marksman.