Casillas will miss the match against "Man Utd" due to a thumb injury (VIDEO) © EuroFootball.com

Madrid's "Real" team will have to face "Manchester United" without their key player in the first leg of the UEFA Champions League round of 16.

The "royal" club, who successfully crossed the barrier of the Copa del Rey semi-finals, will be without Iker Casillas for approximately 6 weeks due to a thumb fracture.

In the return match late on Wednesday night against "Valencia," the 31-year-old goalkeeper suffered an injury at the beginning of the first half and was replaced by Antonio Adan.

Amid confusion in front of the "bats" goal, Alvaro Arbeloa tried to kick the ball out of the penalty area but hit the forearm of the Spanish national team player.

The highly anticipated match between "Real" and the "Red Devils" will take place on February 13 at the "Santiago Bernabeu" stadium.

Casillas' injury: