Winning the midfield battle is imperative for every club, but some teams rely more heavily on the engine room than others.

Led by star ruckman Todd Goldstein, the Kangaroos are a much better team when they can hit the scoreboard from centre clearances.

On average, North Melbourne outscores opponents by eight points a game in victories.

However, that figure plunges to negative territory in defeats (-0.8).

Every side has key performance indicators they value above others.

STATS QUIRK OF THE WEEK: Brent Harvey will equal fellow 400-club member Dustin Fletcher on 234 wins if North Melbourne defeats Collingwood in 'Boomer's' record-equalling match this Friday night. Hawthorn champion Michael Tuck, whose 426 games record Harvey will match, has played in the most victories in AFL history (302), followed by Kevin Bartlett (260) and Bruce Doull (238).