Sami Khedira will be out of action for a month after undergoing treatment on a heart problem, Juventus have confirmed.
Khedira is not expected to return until late March after Juve confirmed he had been treated successfully.
"Today in the morning the player Sami Khedira underwent electrophysiological study and successful interventional therapy with ablation of an arrhythmogenic atrial focus, performed by Prof. Fiorenzo Gaita, JM cardiologist consultant for Juventus," the club said in a statement.
"After a short period of convalescence the player will be able to resume his activity approximately within one month."
Khedira, who joined from Real Madrid in 2015, has made 15 appearances in all competitions for Juve this season.
Massimiliano Allegri's side face Atletico in the first leg of their last-16 tie at the Wanda Metropolitano on Wednesday.