Atletico Madrid are one of our most common opponents in Europe. Before tomorrow's Champions League tie against the Spaniards, check your knowledge of them and the other sides we have met frequently in continental competition.
This is the fifth different season in which we have been drawn to face Atletico Madrid in Europe, with tomorrow's match at Stamford Bridge set to be our ninth competitive game against them in total.
That puts them in third place on the list of teams we have faced most often on the continent, but how much do you know about our previous meetings and the rest of the clubs we have come up against on a regular basis in the Champions League and other European competitions? Try our quiz and find out. Good luck!
If you fancy using that Chelsea knowledge to try to win some fantastic prizes, don't forget to enter the Play Predictor for Wednesday's match.