Contrary to popular belief, Chelsea FC have quite a wide and extensive history, that dates back long before 2003. The team who are known mainly for the roubles of Roman Abramovich may not have had the most trophy laden past, theyve certainly had an interesting journey to becoming the side they are today. The team from West London have changed a lot over the years, going from the brunt of jokes due to their inability to win trophies in the early 20th century, to a successful side with playboy swagger in the seventies. The arrival of Abramovich changed many things, but seemingly not their ability shoot themselves in the foot. Their chances at joining the higher reaches of footballs great clubs were missed in the past, mainly through errors by those in charge of the club. While through the years theyve had their fair share of success, such as becoming the only English team to have won all four European trophies, theyve also made some awful decisions through the years. From twice teetering on the blink of collapse, ridiculous decisions in the transfer market and the dodgy decisions of their Russian owner, here is your complete run down of the worst mistakes ever made by Chelsea.