Unheralded youngster Marc Guiu scored with his very first touches for Barcelona to secure a hard-fought 1-0 win against Athletic Club.
The 17-year-old came off the bench with 11 minutes of normal time remaining against Athletic, and was immediately sent clean through after making a great run down the inside-left channel.
And, after a first touch to set himself, the tall centre-forward slotted a fine finish beyond Athletic goalkeeper Unai Simon to spark jubilant scenes in Barcelona.
The youngster was a surprise inclusion on the bench for the match, having only previously made two full appearances for Barcelona B.
But the talented Spain Under-17 international’s moment of brilliance proved the difference on a night that saw chances go begging at both ends.
Victory for Xavi’s side moves them one point off the top of La Liga with the Clasico coming up next weekend.
