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Description
The Performance Stat Index (PSI) was first introduced in 2009 in the form of a workbook for players on the ATP Challenger circuit to make them aware of strengths and weaknesses as well as get an overall view of their performance. Two more indexes were later added to the PSI for players in the intermediate and more advanced player range right below the highest level Index used on the ATP Challenger circuit.
Index 1: players with UTRs 3-6.99
Index 2: players with UTRs 7-10.99
Index 3: players with UTRs 11+
A statistical algorithm adds up the total RATIO DIFFERENCE of WON (Good Shots) to LOST (Bad Shots) points in a set. The algorithm then calculates to find the AVERAGE of points either won or lost PER GAME in the set. We refer to these average numbers of points as PSI Ratings.
Good Shots = Unreturned Serves, Winners, Forced Errors
Bad Shots = Double Faults, Unforced Errors, Missed Makeable Shots
After a set is played, both players receive PSI Ratings. If the player’s final PSI Ratings are positive, it means they won more points than lost. If the player’s final PSI Ratings are negative, it means they lost more points than won.
At the core of the app are the three indexes that ultimately bestow the PSI GRADES. Three areas of a player’s performance are graded within each designated Index; SERVICE PERFORMANCE, GROUNDSTROKE AND AUXILIARY, and OVERALL PERFORMANCE. All areas consist of uniformed parameters of Good Shot/Bad Shot point averages that make up each Index established through years of research of charting competitive matches at all levels of the game.
The following are the PSI PERFORMANCE GRADES.
Excellent Performance
Above Average Performance
Solid Performance
Below Average Performance
Poor Performance
Because the total number of shots recorded can fluctuate, ratios can vary from a 1 to 1.1 ratio to a 1 to 1.9 ratio and so on. A point of reference (midpoint) and closest to Index 2 OVERALL PERFORMANCE parameters is this example.
Excellent Performance
3 Good Shots to 1 Bad Shot Ratio
Above Average Performance
2 Good Shots to 1 Bad Shot Ratio
Solid Performance
1 Good Shot to 1 Bad Shot Ratio
Below Average Performance
1 Good Shot to 2 Bad Shot Ratio
Poor Performance
1 Good Shot to 3 Bad Shot Ratio
Index 1 will have a lower threshold to Solid. Index 3 will have a higher threshold to Solid.
Terms of Use EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
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Index 1: players with UTRs 3-6.99
Index 2: players with UTRs 7-10.99
Index 3: players with UTRs 11+
A statistical algorithm adds up the total RATIO DIFFERENCE of WON (Good Shots) to LOST (Bad Shots) points in a set. The algorithm then calculates to find the AVERAGE of points either won or lost PER GAME in the set. We refer to these average numbers of points as PSI Ratings.
Good Shots = Unreturned Serves, Winners, Forced Errors
Bad Shots = Double Faults, Unforced Errors, Missed Makeable Shots
After a set is played, both players receive PSI Ratings. If the player’s final PSI Ratings are positive, it means they won more points than lost. If the player’s final PSI Ratings are negative, it means they lost more points than won.
At the core of the app are the three indexes that ultimately bestow the PSI GRADES. Three areas of a player’s performance are graded within each designated Index; SERVICE PERFORMANCE, GROUNDSTROKE AND AUXILIARY, and OVERALL PERFORMANCE. All areas consist of uniformed parameters of Good Shot/Bad Shot point averages that make up each Index established through years of research of charting competitive matches at all levels of the game.
The following are the PSI PERFORMANCE GRADES.
Excellent Performance
Above Average Performance
Solid Performance
Below Average Performance
Poor Performance
Because the total number of shots recorded can fluctuate, ratios can vary from a 1 to 1.1 ratio to a 1 to 1.9 ratio and so on. A point of reference (midpoint) and closest to Index 2 OVERALL PERFORMANCE parameters is this example.
Excellent Performance
3 Good Shots to 1 Bad Shot Ratio
Above Average Performance
2 Good Shots to 1 Bad Shot Ratio
Solid Performance
1 Good Shot to 1 Bad Shot Ratio
Below Average Performance
1 Good Shot to 2 Bad Shot Ratio
Poor Performance
1 Good Shot to 3 Bad Shot Ratio
Index 1 will have a lower threshold to Solid. Index 3 will have a higher threshold to Solid.
Terms of Use EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
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4.71 out of 5
217 ratings in Greece
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Pls fix your app!
It’s really good but hd quality repair doesn’t work!!!!!!!!!!!!!
很实用
美图秀秀是我们日常发布照片的最佳助手！
Download it now!!
It’s basically Facetune but FREE. 90% of the stuff are free.
Exellent!!!
I m using this everyday!
不给退款
我不小心开通了会员 里面要会员的那些我都没有用 然后我申请退款结果不给我退 哇 居然还有这样子的 这个软件
闪退
用着好好的突然闪退打也打不开
还不错
老顾客
进不去
从昨天开始一直闪退
这素在。。？
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App Info
- Category
- Photo Video
- Publisher
-
Xiamen Meitu Technology Co
- Languages
- English, French, German, Indonesian, Italian, Japanese, Korean, Portuguese, Russian, Chinese, Spanish, Thai, Tibetan, Turkish, Vietnamese
- Recent release
- 11.21.0 (4 days ago )
- Released on
- Jul 10, 2011 (14 years ago )
- Also available in
- China, Taiwan, Thailand, Vietnam, Hong Kong SAR China, United States, South Korea, Japan, Malaysia, Canada, Singapore, Brazil, Indonesia, Australia, Russia, Mexico, Macao SAR China, United Kingdom, Türkiye, France, Philippines, Saudi Arabia, New Zealand, Germany, Spain, Italy, Ukraine, Egypt, Kazakhstan, Colombia, United Arab Emirates, Netherlands, Argentina, Chile, Peru, Pakistan, Ecuador, Sweden, Switzerland, Poland, South Africa, Israel, Portugal, Belgium, Belarus, Dominican Republic, Azerbaijan, Ireland, Norway, Austria, Armenia, Jordan, Panama, Nigeria, Romania, Denmark, Kuwait, Nepal, Hungary, Finland, Uzbekistan, Qatar, Algeria, Greece, Paraguay, Oman, Czechia, Tunisia, Bahrain, Uruguay, Sri Lanka, Lebanon, Ghana, Bulgaria, Croatia, Lithuania, Latvia, Angola, Slovakia, Kenya, Estonia, North Macedonia, Brunei, Cyprus, Luxembourg, Jamaica, Uganda, Slovenia, Malta, Iceland, Mauritius, Madagascar, Namibia, Suriname, Mali, Belize, Cayman Islands, Bermuda
- Last Updated
- 5 days ago
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