Soccer Power Index: FAQ
What does the SPI rating represent?
The basic concept is that the SPI rating represents a team's overall skill level. The SPI ratings are intended to be forward-looking. They measure a team's relative likelihood of victory if a competitive match were to be held tomorrow. This concept may differ slightly from a retrospective or backward-looking ratings system. We aren't trying to reward or punish teams based on past results so much as we are trying to predict which teams will have the most success ...
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