Chelsea and Atletico Madrid will do battle in the Champions League on Wednesday and the clash brings plenty of intrigue in the form of some old faces.
Of course, Diego Costa has now linked up with his former club Atletico Madrid after they agreed a £52 million fee with Chelsea in the wake of boss Antonio Conte deciding the Brazilian-born Spanish international was no longer in his plans.
Costa won't be able to play for his new side until January thanks to their transfer ban, but Chelsea's top goalscorer for the past three seasons found himself in the dark at Stamford Bridge anyway.
Another man to rejoin Atletico from Chelsea - though via AC Milan - is Fernando Torres and the now-33-year-old became a bit of a cult hero with the Blues for his sheer effort, not goals.
Ahead of compatriot Alvaro Morata joining the Premier League champions from Real Madrid during the summer transfer window, Torres made a classy gesture to Morata before his big move.
"I spoke with (Morata) before he joined Chelsea (for £70m) and told him I would be always on the phone if he needed any advice or if I could help him," Torres has said according to The Mirror.
Morata has started life with Chelsea much faster than Torres managed after his own £50 million move from Liverpool and he has six Premier League goals in six games already.
"Looking at the start he has made it doesn't look like he needs any advice at all - already he is playing well and scoring goals."
Torres went on to lavish praise on Morata and his former club in a move that is sure to keep him a firm favourite amongst the fans.
"Chelsea have one of the best strikers in Europe - and I am sure he is going to win trophies with them," Torres added. "The Chelsea games will not be easy - there is a reason they are Champions of England.
"They will be one of the teams that believe they are capable of winning the competition this season."
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