Cristiano Ronaldo faces a race to be fit for Real Madrid's Champions League quarter-final against Tottenham after suffering a hamstring injury in Saturday's victory over Atletico Madrid.
A similar problem caused Ronaldo to miss two games prior to last week's victory over Lyon, and he complained of pain once again after coming off towards the end of Real's 2-1 victory in the derby at the Vicente Calderon.
The 26-year-old was subsequently taken away for tests, with the verdict being that he could now miss up to three weeks of action.
"Cristiano Ronaldo felt pain and had inflammation on the biceps femoris of his left thigh after the match with Atletico," a club statement read, before later adding that he will be sidelined for "between two to three weeks, depending on his progress".
That would make him a major doubt for the first leg of the club's clash with Spurs, which takes place at the Santiago Bernabeu on April 5 - just over a fortnight away.
He will definitely miss Portugal's two forthcoming friendlies against Chile and Finland, while the La Liga clash with Sporting Gijon in 14 days could also come too soon for him to participate.