The 2 first factors of reference for evaluation of efficiency are the sideout percentange (SO%) and breakpoint proportion (BP%). These two statistics measure precise efficiency within the two principal phases of the sport: when the opposite crew serves and once I serve.
SIDEOUT PERCENTAGE / RATE
That is merely the proportion of instances a crew wins the rally when the opposing crew serves. That’s, the variety of rallies gained when the opposing crew serves divided by the variety of opposition serves. Word this statistic has NOTHING to do with assault.
BREAKPOINT PERCENTAGE / RATE
The proportion of rallies a crew wins after they serve.
These two statistics give the essential define of all efficiency. To these we will add three extra fundamental statistics.
MODIFIED SIDEOUT PERCENTAGE / RATE
The modified sideout proportion (modSO%) is much like the SO%, however excludes opponent service errors. It’s the variety of rallies gained when the opposing crew serves divided by the variety of receptions. NOTE: There is no such thing as a equal ‘modified’ breakpoint proportion.
RECEPTION
The principle statistic for following reception is the anticipated sideout proportion (expSO%). That is anticipated sideout charge for the crew based mostly on the standard of the reception (i.e the receiver’s cross scores) and the dataset-wide sideout charges by reception high quality. For instance, the accompanying desk represents the precise sideout scores for a selected league. If participant A receives two serves completely (#), 4 serves nicely (+), one serve okay (!) and overpasses one serve (/) then the calculation is:
(2 x 0.766) + (4 x 0.702) + (1 x 0.660) + (0 x 0.563) + (1 x 0.212) / NUMBER OF RECEPTIONS
exp SO% = 0.651
NOTE: The sideout proportion for a service ace is 0.
SERVING
The principle statistic for following serving is the anticipated breakpoint proportion (expBP%). That is anticipated breakpoint charge for the crew based mostly on the standard of the serve (based mostly on the opponent’s reception ) and the dataset-wide breakpoint charges by serve high quality.
ExpBP% is calculated in the identical approach as anticipated sideout proportion %.
One other fascinating twist on serving statistics is to have a look at opponent reception towards a selected server. That’s the opponent anticipated SO% (opp.expSO%). This appears to be like at serving from the attitude of the recievers, the principle distinction being that service errors are subsequently not included.
With these 5 statistics, and understanding the relationships between them, we will merely and elegantly analyse each crew part of the sport.
