Newcastle are set to sign the Brazilian defender Marlon Santos on loan for the next season.
According to Spanish Publication Sport, the Magpies are in talks with the La Liga champions regarding the move.
The report adds that Newcastle will pay a loan fee of around €2m for Marlon.
The highly-rated young centre-back needs to play regular first-team football in order to continue his development and he is unlikely to get that opportunity at Camp Nou next season. The arrival of Clement Lenglet has pushed the Brazilian further down the pecking order.