There are plenty of players who have been at both of these two clubs, including four in the current squads, with Marcos Alonso starting his career at Real Madrid and Mateo Kovacic joining Chelsea from Los Blancos, initially on loan, before making the move permanent in 2019, while his former Blues team-mate Eden Hazard is currently with the Spanish side, as is another Belgian Thibaut Courtois.

But what about those that are no longer with either club? How well do you remember their Chelsea careers? We have listed 10 such players below, so see if you can put them in the right order based on how many goals they scored for the Blues, with the highest first. Good luck!

If you fancy using that Chelsea knowledge to try to win some fantastic prizes, don't forget to enter the Play Predictor before the match.