2017 USTA National Championships - Analysis

	A	B	C	L	Q	T	U	W	X	AC	AD	AE	AH	AK	AL	AR	AU	AZ
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2	2017 USTA National Championships - System Comparisons
3	How often do the different rating systems correctly predict the winners of matches?
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8				TRN										UTR
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11				75.1%					69%					75.6%
12				75.1%					69%					75.6%
13					51%				394 / 570			55%
14					51%				394 / 570			55%
15					66 / 130							91 / 166
16					66 / 130							91 / 166
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18									80%
19									80%
20									1,754 / 2,182
21							45%		1,754 / 2,182		49%
22							45%				49%
23						75 / 166				64 / 130
24						75 / 166				64 / 130
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26
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28									31%
29									31%
30									176 / 570
31									176 / 570
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34								USTA
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37								68%
38								68%
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40		All Rating Systems
41		How often do all the systems agree on the outcome?											2182		matches	72%	of the time
42			When they agree, how often does the higher rated player win?										1754		times	80%	of the time
43			When they agree, how often does the lower rated player win?										428		times	20%	of the time
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45		TRN & UTR Ratings
46		How often do TRN and UTR agree on the outcome?											2752		matches	90%	of the time
47			When they agree, how often does the higher rated player win?										2148		times	78%	of the time
48			When they agree, how often does the lower rated player win?										604		times	22%	of the time
49		How often do TRN and UTR disagree on the outcome?											296		matches	10%	of the time
50			When they disagree, how often does the higher rated TRN player win?										141		times	48%	of the time
51			When they disagree, how often does the higher rated UTR player win?										155		times	52%	of the time
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53		TRN & USTA Ratings
54		How often do TRN and USTA agree on the outcome?											2348		matches	77%	of the time
55			When they agree, how often does the higher rated player win?										1829		times	78%	of the time
56			When they agree, how often does the lower rated player win?										519		times	22%	of the time
57		How often do TRN and USTA disagree on the outcome?											700		matches	23%	of the time
58			When they disagree, how often does the higher rated TRN player win?										460		times	66%	of the time
59			When they disagree, how often does the higher rated USTA player win?										240		times	34%	of the time
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61		UTR & USTA Ratings
62		How often do UTR and USTA agree on the outcome?											2312		matches	76%	of the time
63			When they agree, how often does the higher rated player win?										1818		times	79%	of the time
64			When they agree, how often does the lower rated player win?										494		times	21%	of the time
65		How often do UTR and USTA disagree on the outcome?											736		matches	24%	of the time
66			When they disagree, how often does the higher rated UTR player win?										485		times	66%	of the time
67			When they disagree, how often does the higher rated USTA player win?										251		times	34%	of the time
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70		Notes: This chart only uses the 3,048 matches from our study that were played to completion where both players were rated by all systems and player ratings were unique (i.e., no projected ties).
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72																		3048