Barcelona coach Xavi Hernandez felt his team did not deserve to lose the Clasico after two Jude Bellingham goals saw the visitors win 2-1.
Lamine Yamal became the youngest player to feature in a Clasico when he came on as a substitute on Saturday at the age of 16 years and 107 days.
Frenkie de Jong did not feature in El Clasico on Saturday because he was still feeling some discomfort in his ankle after training with the team on Friday.
Barcelona defender Ronald Araujo says Barcelona lost the Clasico on Saturday because they lost control of the match in the second half.
Ronald Araujo thought he should have been awarded a penalty against Real Madrid after a pull by Aurelien Tchouaméni.
Mick Jagger and Ronnie Wood of the Rolling Stones were at El Clasico on Saturday to watch Barcelona take on Real Madrid at Montjuic.
Barcelona goalkeeper Marc-Andre ter Stegen admitted he was frustrated to lose to Real Madrid after seeing Los Blancos win despite creating few chances.