Barcelona substitute Dani Olmo struck in the 82nd minute to grab a 2-1 comeback victory at Rayo Vallecano on Tuesday, as the LaLiga leaders continued their perfect start to the season with a third consecutive win.
Rayo dominated proceedings in the first half and took the lead with a strike by Unai Lopez in the ninth minute, but Barca were livelier after the break, with Pedri levelling from a counter attack in the 60th minute.
Olmo, who was making his debut for Barca after signing from RB Leipzig, scored the winner with a curling strike in the 82nd minute, giving Barca a deserved win to maintain their momentum.
Barcelona top the standings on nine points from three games, two ahead second-placed Villarreal. Rayo are eighth on four points.