Barcelona's teenage substitute Marc Guiu scored late in the second half on his debut to secure a 1-0 home win over Athletic Bilbao in LaLiga, sending Xavi Hernandez's side up to third.
Barca, who were without the injured Frenkie de Jong, Pedri and Robert Lewandowski, had more possession but created fewer chances than the visitors in first half, where their best opportunity saw Joao Felix hit the bar in the 10th minute.
But Barcelona were sharper in attack after the break and 17-year-old striker Guiu scored in the 80th minute, seconds after coming on for Fermin Lopez.
Barca climbed one place with 24 points, one point behind Real Madrid before they host El Clasico next Saturday.
0' The match is about to start!
4' Inaki Williams' long shot stopped
10' Felix hits the bar
14' Fermin's shot stopped
37' Yellow Card! D.García booked
41' Yellow Card! Romeu booked
45' Ter Stegen makes good save
58' Femin misses good chance
63' Yamal's shot inches wide
74' Cancelo's shot stopped
80' GOAL! Barcelona 1-0 Athletic Club (Marc Guiu)
Barcelona XI: Gundogan, Romeu, Ter Stegen, I. Martinez, Cancelo, Christensen, Ferran Torres, Felix, Álex Baldé, Gavi, Fermín López
Subs: Alonso, Pena, Ronald Araújo, Ander Astralaga, Lamine Yamal, Unai Hernández, Héctor Fort, Marc Guiu
Athletic Club XI: De Marcos, Berchiche, D.García, Iñigo Ruiz de Galarreta, I.Williams, Unai Simón, Gorka Guruzeta, Dani Vivian, Oihan Sancet, Aitor Paredes, Nico Williams
Subs: R.García, Muniain, Lekue, Asier Villalibre, Berenguer, Peru Nolaskoain, Imanol García de Albéniz, Beñat Prados, Julen Agirrezabala, Adu Ares, Unai Gómez
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