Spain right-back Dani Carvajal suffered a fourth injury of the season in the weekend's win over Valencia, his club Real Madrid said on Monday.
Carvajal, 29, was making his return from another leg problem but the Spanish giants did not disclose the length of his unavailability with local reports claiming he will be out for around two months.
"Following tests carried out on our player, Dani Carvajal, by the Real Madrid Medical Services, he has been diagnosed with a muscle injury in his right thigh affecting the tendon," they said.
"His recovery will continue to be assessed," they added.
Carvajal left the field after 25 minutes at the Estadio Alfredo Di Stefano on Sunday. He has also sustained knee ligament damage this season.
Madrid coach Zinedine Zidane was already without captain Sergio Ramos, Eder Militao, Alvaro Odriozola, Eden Hazard, Rodrygo, Fede Valverde and Marcelo with the Champions League last 16 first leg at home to Atalanta on February 24.
"I don't understand. It's true that it's a lot of injuries. I'm worried and I'm sorry for Carva," Zidane said following the weekend's game.
This Saturday, Madrid head to struggling Real Valladolid in La Liga, trailing city rivals and league leaders Atletico Madrid, who have two games in hand, by five points.