Chelsea welcome Arsenal to Stamford Bridge tomorrow with the story of the day undoubtedly the presence of Cesc Fabregas for The Blues.
Chelsea snapped him up this summer from Barcelona after the Catalan side decided to give up on the player, who they felt never lived up to his price-tag in Spain.
Of course he could have gone elsewhere, he could have gone back to Arsenal.
Arsenal had a buy-back clause in Fabregas' contract which Arsene Wenger controversially decided not to activate. He felt the club did not need the 27-year-old former captain as they already have plenty of options in the midfield area.
His move to Chelsea is of course a divisive choice.
Fabregas has a chequered history against Chelsea. It is not just the fact that Arsenal v Chelsea is a fierce London derby. It is not just the fact that Arsenal and Chelsea will both expect to challenge for the title this season.
It is the fact he has always got under Chelsea's skin while he was at Arsenal.
Here we present a gallery of some of his, ahem, finest moments against Chelsea from when he was an Arsenal player.
They include him celebrating goals against the club, getting in fights and even having a stick of celery thrown at him by angry Chelsea fans during a League Cup final.
He certainly has a past with Chelsea, but now his future is also with them, a thought which certainly leaves a bad taste in the mouth for Arsenal fans.