No matter the time of the season, El Clasico is always a momentous occasion. Any player is capable of deciding this type of match, be it goalkeeper, defender, midfielder or striker.
In the case of Courtois and Ter Stegen, both goalkeepers will have to deal with their opponents' offensive potential for 90 minutes.
The battle between these contenders is expected to be an exciting one, as circumstances force Madrid to win the match and take the lead away from Barça.
The Belgian player has an advantage, as he is on his way to a record. In just 22 La Liga games, the former Chelsea man has conceded just 14 goals.
If we compare their numbers with the German, Courtois comes out on top. Ter Stegen has conceded 27 goals in 24 games.
However, their face to face record is also worth sharing: Courtois has never won a game against Ter Stegen, with three losses and two draws in five games.
The 'Clásico' will be in their hands and both know they must play a great game if they are to keep their teams' LaLiga chances alive.
In the first round, the score was 0-0 thanks to the work of the goalkeepers. If the result is repeated, it would become a historic landmark for El Clasico.