The 24-year-old, still to be capped by Brazil’s senior side, has completed a five-year deal with the Spanish club.
“This is the pinnacle for me – this is everything I could wish for,” he said. “I want to learn, because the game here is different to how we play in Brazil.”
Barca accepted the deal on Wednesday and Douglas completed the movement on Friday after passing a medical.
They will pay an initial fee of €4m (£3.2m) and up to €1.5m (£1.2m) based on the appearances for the club reports BBC football
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