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Spanish football giants Barcelona on Sunday agreed to terms to sign Brazilian midfielder Arthur Henrique Ramos de Oliveira Melo from Gremio. "FC Barcelona and the Brazilian club Gremio de Porto Alegre have reached an agreement on a purchase option for the player Arthur Henrique Ramos de Oliveira Melo, whereas FC Barcelona may exercise this right on the player's federative rights during July of 2018," the La Liga club said in a statement.