Rivalry should be done with a club that has nearly same play style and close encounters a team against whom we feel like wearing that blue jersey and scream out in support. So far, a team that plays tactically like Chelsea and has fans all into it is I suppose Arsenal with player of samilar class and respects. read more
Like Manchester have a Red and Blue side, London too has a Red and Blue side(Arsenal and Chelsea). I would consider the biggest rivals of Chelsea would be Arsenal. It does seem like a real derby. THE LONDON DERBY. read more
Based on geography you would say Port Vale but because they are in League One which is the 3rd tier, albeit they are the local rival. Fellow Midlands clubs West Bromwich Albion and Wolvermpton Wanderes would be their current rivals because they are bigger clubs than Port Vale and have been in the EPL. read more