Upsets are listed in order of magnitude based on the score and power rating
differentials. An upset occurs when a team with a lower power rating beats
a team with a higher power rating. Home field advantage is included. For
example, consider the following: Team A (PR=22.0) plays on the road against
Team B (PR=25.0), with the average home field advantage for this league or
division being 2.0 goals. Therefore, Team A is predicted to lose the match
by ((25 + 2) - 22) = 5 goals. But now suppose that Team A wins 11-9. The
difference between the expected and actual outcome is 7 goals, a big upset.