Page last updated at 18:33 GMT, Sunday, 28 September 2008 19:33 UK
Who are Cluj?
Founded in 1907, Cluj (pronounced "Klooj"), or Caile Ferate Romane Cluj-Napoca to give the club its full name, are the Romanian league champions who will line up against Chelsea on Wednesday.
The club hail from the city of Cluj-Napoca - the third largest city in Romania - situated in the province of Transylvania, home to the famous nocturnal blood-sucker Count Dracula, some 300 miles west of the capital Bucharest.
But only six years ago, CFR (the acronym stands for Romania's state railway company) Cluj were playing third division football with little prospect of success.
So how has the club rejuvenated itself into Euro beaters?