[gusmahler]

I was just looking through a kid's book about sports rivalries and it was detailing some of the biggest rivalries in sports. According to the book, the biggest rivalry is Red Sox/Yankees, scoring 100 on the 100 point scale. A few other rivalries score in the upper 90s, including Michigan/OSU and Duke/UNC.

Which are the biggest EPL rivalries? How would you compare those rivalries to Yankees/Red Sox and the like?

(I remember reading that Old Trafford used to hang a banner with the number 29 on it, the number of years since Man City won the top flight. Which, I guess is similar to the "1918" chants that Yankees fans used to do.)