Real Madrid are huge fans of the Flamengo forward, 16, and had eyed up a move themselves.
But according to Marca, Vinicius' dad and representatives are already in Spain to negotiate a move to Barca instead.
GETTY
Vinicius Junior, 16, has a £27m release clause in his current contract
Crucial to Barcelona's dealings is Andre Cury, the man who signed Neymar.
Cury has connections with Traffic - the company representing Vinicius - and he has reportedly been tasked with forming a bond with the player and his family.
Vinicius impressed at this year's South American Under-17 Championship, where he played for Brazil.
He has a £27m release clause in his current contract - a huge sum for an unproven teenager.
We use your sign-up to provide content in ways you've consented to and to improve our understanding of you. This may include adverts from us and 3rd parties based on our understanding. You can unsubscribe at any time. Read our Privacy Policy