“It’s the derby which has everything – two sides with a simmering rivalry, rich histories and, in recent years, a similar appetite for trophies. When Manchester City and Manchester United meet on the football pitch, there’s generally plenty of goals, drama and even the odd ‘Why always me’ T-shirt. The two teams clash at Etihad Stadium on Sunday, and BBC Sport has compiled an A-Z of one of English football’s biggest games.” BBC