In the quarterfinals of the Copa del Rey the Catalans lost to Athletic Bilbao and left the tournament. Two strikes by the Basques in extra time proved fatal.

2023-24, Spain - Copa del Rey

Athletic Bilbao - Barcelona 4:2 (1:2)
Goals: Guruzeta, 1 (1:0); Lewandowski, 26 (1:1); Yamal, 32 (1:2); Sancet, 49 (2:2); Inaki Williams, 105 (3:2); Nico Williams, 121 (4:2)

Athletic Bilbao: Agirrezabala; Paredes; Yuri Berchiche; Vivian; Prados (Herrera, 90); Sancet; Lekue I. (de Marcos, 90); Vesga (Etxebarria U., 46); Ares Djaló (Inaki Williams, 59); Nico Williams; Guruzeta (Villalibre, 73)
Bench: Simón U.; Yeray; Nolaskoain; Raul Garcia; Muniain
Yellow Cards: Sancet 36; Prados 83; Herrera 109; Nico Williams 121

Barcelona: Peña I.; Balde Al. (Fort H., 23); Kounde; Christensen A. (Paredes Pau, 70); Araujo R.; de Jong F.; Gundogan; Yamal (Guiu Marc, 106); Torres F.; Pedri (Sergi Roberto, 99); Lewandowski (Félix J., 78)
Bench: Astralaga; Yaakobishvili; Cancelo; Romeu; Lopez Fer.; Roque
Yellow Cards: Christensen A. 15; Torres F. 83; Fort H. 84; Yamal 95; de Jong F. 115; Sergi Roberto 117