Therefore, the match day squad in full is: Ter Stegen, Piqué, Rakitic, Sergio, Denis, Arda, A. Iniesta, Suárez, Messi, Cillessen, Mascherano, Paco Alcácer, Jordi Alba, Digne, Sergi Roberto, André Gomes, Aleix Vidal –travelling with the squad- Umtiti and Aleñá (28).

REAL MADRID SQUAD
Goalkeepers: Navas, Casilla and Yáñez.
Defenders: Carvajal, Ramos, Nacho, Marcelo and Danilo.
Midfielders: Kroos, James, Casemiro, Kovacic, Modric, Asensio and Isco.
Forwards: Cristiano Ronaldo, Benzema, Bale, Lucas Vázquez and Morata.

출처 : 

https://www.fcbarcelona.com/football/first-team/news/2016-2017/squad-announcement-fc-barcelona-s-squad-for-the-trip-to-madrid-for-el-clasico

http://www.realmadrid.com/en/news/2017/04/the-20-man-squad-for-the-barcelona-match