Real Madrid are challenging Barcelona for Gremio midfielder Arthur Melo.

Marca says angry at the leak of a photo showing midfield talent Arthur in a Barcelona shirt alongside Robert Fernandez, Gremio have begun to speak to officials of Real Madrid about signing the Brazilian.

The 21-year-old has become one of the revelations of the Brazilian championship with his teammate Luan, leading their club to the conquest of the Copa Libertadores.

This honour allowed the team to qualify for the Club World Cup, ultimately seeing them advance to face none other than Real Madrid in the final on Saturday.

For now, Gremio are urging Real to meet Arthur's €50m buyout clause.