This one’s a modern rivalry for the ages.
Barca and Chelsea have been at it since the early 2000s, when the nouveau riche Blues began to emerge as a continental power. Since then, there have been several utterly thrilling encounters between the two sides, not least the famous – or infamous, depending on your point-of-view – Champions League semi in 2009.
But despite the supposed animosity, there has also been significant crossover in terms of playing personnel (which dates all the way back to 1995), with 13 men having represented both sides. However, only five of these players have managed to win a domestic league title at both clubs.
How many of them can you name?
Note: players must have won La Liga while at Barcelona, and the Premier League while at Chelsea.