Real Madrid striker Karim Benzema is expected to be out for up to a month because of a right leg muscle injury.
Benzema will miss upcoming Spanish league games and the Champions League return match against Roma next week. Madrid won the first leg 2-0 in Rome.
The Frenchman should be fit again in time for El Clásico against Barcelona in the Spanish league at the Camp Nou on 2 April.
Madrid did not say exactly how long the player was expected to be sidelined, noting that “his recovery will continue to be assessed”.
Benzema had missed the game against Malaga a week ago because of a back problem. He was substituted at half-time in Madrid’s 1-0 home defeat against Atlético Madrid because of the muscle injury.
On Satuday Atletico Madrid won a third consecutive La Liga Bernabeu derby to practically end Real Madrid's title hopes.
Diego Simeone's visitors are now five points off leaders Barcelona, who have a game in hand, while Real are nine points below the champions.
Antoine Griezmann scored the only goal, early in the second half, when he steered Filipe Luis' pass home.
Real, who were two points off Barca when Zinedine Zidane took over, had not lost in his first eight games as boss.
The result means Atletico are the first side in La Liga history to win three times in a row at the Bernabeu, as Real fans called for club president Florentino Perez to resign.