Madrid minnows Unión Adarve have taken Barcelona to FIFA.

Unión Adarve are demanding €103,000 from Barca over the signing of Marcos Alonso.

The Madrid Segunda Federación club insists they're owed the fee as compensation for junior training.

Despite Barca signing him as a free agent from Chelsea, it's been claimed by Unión Adarve that a value was involved as Pierre-Emerick Aubameyang moved in the opposite direction in August.

They are now hoping for a FIFA tribunal ruling in their favour.