Barcelona restored their nine-point lead at the top of La Liga with a narrow victory at Athletic Bilbao.
Raphinha hit the winner with a drilled effort in first-half injury-time.
Barca goalkeeper Marc-Andre ter Stegen made several fine stops to deny Bilbao, who had a late Inaki Williams goal ruled out for handball after a lengthy Video Assistant Referee (VAR) check.
Oier Zarraga's effort was also cleared off the line by Jules Kounde in added time as Barca clung on.
It meant Xavi's side extended their advantage over rivals Real Madrid, who had briefly cut Barca's lead to six points after beating Espanyol on Saturday,