Real Madrid have been forced to scrap a deal for Fluminense striker Ramón de Araújo Siqueira over a failed medical.
Ramon, 19, was in talks to sign for Real this month, reports AS, and was being lined up for Castilla next season.
However, concerns over an old injury to his left knee forced Real to pull out.
Flu confirmed: "The attacker Ramón, of the U20 team and who was in negotiation with Real Madrid B, presented problems in the medical examinations (left knee, the same one that was operated in August of 2016).
"In conjunction with the player's representatives, the clubs decided that he will return to Brazil to be re-evaluated."