Pedri scored the winner in his 100th club game as Barcelona extended their lead at the top of La Liga to six points with a slender win over Girona.
The 20-year-old tapped home from four yards after Jordi Alba’s cross was fumbled by Fulham loanee Paulo Gazzaniga.
The win extends Barcelona’s unbeaten run to nine league games.
They have 47 points with second-placed Real Madrid, who have a game in hand, on 41 points.
Real Madrid host third-placed Real Sociedad on Sunday.