Barcelona football chief Raul Sanllehi is locked in talks with Fluminense for Gerson.
Lance says Sanllehi was in the offices of Flu this week to meet with directors about Gerson.
Juve have made a €16 million bid for Gerson, which kicked Barca into action.
O Dia reports Barça now have five days to decide whether to match Juve's offer, which also includes a 20% sell-on clause for Fluminense.
Gerson and his father, Marcao, favour a move to Barça, but this dream could be dashed by the situation at the Camp Nou, with the presidential elections campaign in full swing and the club's summer market ban.