Chelsea have a long history of players joining either Real Madrid or Barcelona. Over the last two decades, Arjen Robben, Ricardo Carvalho, Thibaut Courtois and Eden Hazard have all made the switch to Los Blancos.
Meanwhile, Icelandic legend Eidur Gudjohnsen, who won back-to-back Premier League titles under Jose Mourinho, opted for a move to Barcelona. It has actually been far more frequent for players to make the switch from Camp Nou to Stamford Bridge, with Cesc Fabregas, Pedro, Deco and Albert Ferrer all choosing to ply their trade in west London.
The question is who will be the next Chelsea player to make the move to Spain. Ahead of tonight's El Clasico in the Copa Del Rey, FairBettingSites found Mason Mount and Christian Pulisic to be the most likely candidates to sign for either of the Spanish giants.
