Re: Cincinnati court speed
You have to remember that the Court Pace Index is not the same as the Court Pace Rating. The Court Pace Rating is a scientific measurement of the friction/bounce height/trajectory of each surface - but this does not take into account weather conditions, altitude, etc.
However, the Court Pace Index (the statistic referenced in the OP) does take into account these external factors - it is an average speed based on Hawkeye data for each tournament each year (which is why the rating changes by day - because weather changes every day so the average speed changes daily). There is a second thing at play here though that makes the stats seem more deceptive - the particular players who are playing each tournament and making it far in those tournaments impacts the "average" speed of the courts that the CPI reports. This is why Madrid appears slower than Monte Carlo this year - the Madrid semifinalists were Thiem, Cuevas, Nadal and Djokovic who all tend to produce longer rallies. Similarly Indian Wells appeared slower than Miami because the semifinalists in Miami were on average better shotmakes/servers - Federer, Kyrgios, Fognini as opposed to Sock and Carreno Busta in Indian Wells. Similarly in Cincinnati the early exits (or withdrawls) of players like Federer, Raonic, Zverev, Del Potro, etc. impacts the average shot speed, rally length, etc. when compared to montreal which in turns impacts the Hawkeye data that the CPI is based on.
Last edited by Rrobba; 08-19-2017 at 11:34 AM.