This injury was found again in the match between Real Madrid and Borussia Dortmund and won 5-2 in the Champions League.
It is a great loss for the Real Madrid team because they needed Courtois to help them continue to perform well in important competitions such as Laliga in Spain, and even in the UEFA Champions League.
Real Madrid will use Andriy Lunin while Courtois is out, as Lunin has played two games this season and was impressive against Villarreal.
Thibaut Courtois has been plagued by injuries late in his career, including an ACL injury that kept him out of action for much of last year, as he played just four games in the Premier League.
The man from Belgium has played for Real Madrid in 9 Spanish league games and 3 Champions League games this year.
However, how long Courtois will have this injury is not known, while he is being treated by doctors.