By Ewan Murray Not all football clubs are made equal, with various sides across the world boasting unbelievable fanbases and deep trophy cabinets. Plenty of clubs in Europe and South America have enormous global followings, with supporters cheering them on across the world. Here are the 30 biggest clubs in world football. Real MadridLet’s start with the biggest club in world football: Real Madrid. The Spanish giants are gargantuan both domestically and in Europe, with a record 14 Champions League/European Cup trophies shining brightly in their vast cabinet. They have boasted some of the best p…