The win was Barcelona's first of the new LaLiga season, and it came on the road against Real Sociedad, where Robert Lewandowski scored twice to lead the team to a 4-1 victory.
Ansu Fati, a teenage phenomenon in Spain, came off the bench in the second half and grabbed control of the game
with two assists and a goal despite having been trying to recover from a series of knee surgeries over the past two years.
The Poland striker, who was playing in honour of his birthday, scored the game's first goal in the very first minute
blasting a shot into the goal after a fantastic ball from Alejandro Balde inside the penalty area.
Until coach Xavi Hernandez substituted Raphinha and Fati in the 64th minute, Barca could not break the deadlock.
To begin, following some excellent work by Raphinha individually, Fati provided a wonderful heel pass to Ousmane Dembele, who then scored.
Ten minutes later, Lewandowski paid it forward by setting up Barca's fourth and winning goal by 19-year-old Fati.
The game was tough, as they always are when you come here, Xavi stated after the game. "Like in the second half, when we play with more patience
we're lot better. In the first half, we lacked something. During halftime, we discussed how to better target the space. This victory was rightfully ours.
The Barcelona coach also discussed the game-changing adjustments he made to his team's strategy.