Oh no you don’t! How the ITF protects the integrity of tennis · How the ITF protects the...
Transcript of Oh no you don’t! How the ITF protects the integrity of tennis · How the ITF protects the...
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Ohnoyoudon’t!HowtheITFprotectsthe
integrityoftennis
TIAUKmeeting16March2015
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Rackets
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Racketpowerandvibration
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Racketspinandcontrol
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Spin
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Spinandstringtype
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Spin– thefacts!
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Spin– thefacts!
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Playeranalysis
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Playeranalysis
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‘Real’spindata
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Surfaces
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Shoe-surfaceinteraction
• Footfixed;brakingachievedusingkneeflexion
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Shoe-surfaceinteraction
• Footslidestoachievebraking;lesskneeflexion
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RallyTrack
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Pointanalysis
Duration:15.2sTotaltravel:29.5mSteps:47Steprate:3.3± 6.1HzSteplength(quartiles):50cm(25%),73cm(50%)and100cm(75%)
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Occupancymaps
Time(seconds) Steplength(m)
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CourtPaceRating
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Sestée
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SPRiteevolution
1G2G
3G
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4GSPRite
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Green=176kph,0rpm;blue=235kph,2500rpm;red=285kph,4700rpm
Modelling
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Stateofthegame
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Simulatedserve|Timetobaseline
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1st Serves|Winners
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Freq
uenc
y (%
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1st serve speed (km/h)
Men (Winners)
Women (Winners)
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Forehands|Winners
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15 25 35 45 55 65 75 85 95 105
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Freq
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Forehand speed (km/h)
Men (Winners)
Women (Winners)
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Forehands|Men|Winners
NET SERVICELINE BASELINE
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Forehands|Women|Winners
NET SERVICELINE BASELINE
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PLAYER
COACH
INTERNET
AUXILIARYDEVICE
INTEGRATEDEQUIPMENT
REMOTEEQUIPMENT
IN-STADIUMDISPLAY
PlayerAnalysisTechnology(PAT)
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Player Analysis Technology Approval certificate
Hawk-Eye Test code: PAT-13-002 Serial no: n/a Software version(s): n/a Firmware version: n/a Issue date: 24 December 2013 Objective: To test and evaluate Hawk-Eye Player Analysis Technology according to Rule 31 of the 2014 Rules of Tennis. Result: Approved SUMMARY Multiple cameras fixed around the court are used to capture images of play. The cameras are connected to personal computers (PCs) on a wired, isolated network. Software, on the network, is used to reconstruct the ball and player trajectories in three dimensions from the camera images and a virtual model of the court. The trajectory information is used to generate virtual replay graphics of the flight of the ball and movement of the players, and match statistics. The event owner/sanctioning body/customer determines the information that can be distributed by Hawk-Eye. Information can be sent to the in-stadium display, TV broadcast and internet-enabled devices. The provision of line call replays to the in-stadium display is controlled by the chair umpire (and review official). Restrictions on the access by a player to Hawk-Eye components during periods when coaching is and is not allowed are as follows:
COMPONENT NO COACHING COACHING Video cameras Permitted Permitted Two-way radio Not permitted Permitted In-stadium display Permitted Permitted Auxiliary device (e.g. smartphone) Not permitted Permitted
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