Chelsea and FC Barcelona have provided football lovers with a few cracking fixtures in the UEFA Champions League in the past, and building up to tonight's game, here are 10 players who represented both teams at some point.
Tired of reading? Click through the gallery above to see 10 stars who played for both Chelsea and Barcelona in their careers, according to the Daily Mirror.
Spain internationals Pedro and Cesc Fabregas are two former Blaugrana stars who are currently playing for the Blues. The pair won the Champions League trophy with the Spanish giants and will be looking to do the same for the Stamford Bridge club this season.
The African continent also has a representative who played for both teams, and it is none other than Cameroon legend Samuel Eto'o. The striker played for the Spanish giants during arguably his peak years but was well into the twilight of his career when he played for Chelsea.
Another striker who played for both sides is former Iceland international Eidur Gudjohnsen. The 39-year-old made 112 appearances for the Blaugrana, and 246 appearances for the reigning Premier League champions.
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Others who have represented both clubs, according to the Daily Mirror, are Deco, Juliano Belletti, Emmanuel Petit, Boudewijn Zenden, Oriol Romeu and Ricardo Quaresma.
What's your prediction for the first leg between Chelsea and Barca tonight? Have your say in the comments section below.