Manchester City captain Vincent Kompany says the derby on Monday night will be as big as Spain's El Clasico.
City face Manchester United on Monday night.
Kompany said: "I know what it means to the people and it's impossible not to know the history. It's impossible not to know about the derbies.
"Before you join the club you find out about the victories and I guess it has become, after El Clasico, the biggest game in the world in a league competition."