The Racquet Court Speed Data
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The Court Pace Index (CPI) data has obvious limitations.
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It doesn't fully account for certain impacting variables.
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Altitude, ball-fluff, weather etc. can make these figures a bit hit and miss, and subject to change day to day, player to player (especially if one player hits with much more/less spin than average).
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Method/Formula:
CPI=100(1-μ)+150(0.81-e)

Where μ is the coefficient of friction
e is the coefficient of restitution
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The data in this spreadsheet is taken directly from the ATP/TennisTV/Hawkeye official CPI charts. Figures from 2012-2015 aren't widely available but I'm working on getting them. This spreadsheet will be updated with new figures.
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Because CPI changes throughout tournaments there are some inconsistencies between different charts.
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When presented with two different numbers, I've chosen the more recent figure on the assumption these are more likley to be be an avg from the tournament rather than a specific day reading.
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Classification:
Category 1: Slow court: CPI <29
Category 2: Medium slow court: CPI 30-34
Category 3: Medium court: CPI 35-39
Category 4: Medium-Fast court: CPI 40-44
Category 5: Fast court: CPI >44
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Any questions: @MattRacquet
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Or infotheracquet@gmail.com
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Thanks to @TennisAbstract for some of the accompanying data (RPW, Ace Rate & Breaks).
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* Note: In the 2015 sheet, most of the values between Indian Wells and Cincinnati are probably innacurate.
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* Note: Ace Rate, Breaks of Serve & Return Points Won are Main Draw figures only, not qualifying.
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