Statistical Analysis and Estimated Tennis Ratings to the 10,000th of a Point
Match History (2023) View Advanced Player Stats
David Kumasaka (Flagstaff, AZ)
Male 		3.5 C
12/31/2023
Estimated Dynamic Rating 3.5925
6/21/2024
Projected Year End Rating ------
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3.5 Rating Meter
Rating Meter
3.0001 - 3.5000
Recent Match History Current Rating History
2023 Overall Season [Doubles]
League/Level Total
Matches		 Win Loss Tie WPct Total
Sets		 Win Loss WPct Total
Games		 Win Loss WPct Defaults
Adult 18+ 4.0 6 3 3 0 50.0 15 8 7 53.3 114 60 54 52.6 0
Adult 40+ 4.0 7 1 6 0 14.3 16 4 12 25.0 135 54 81 40.0 0
Mixed 18+ 8.0 3 1 2 0 33.3 6 2 4 33.3 56 23 33 41.1 0
Mixed 40+ 8.0 7 3 4 0 42.9 17 8 9 47.1 132 65 67 49.2 0
Total 23 8 15 0 34.8 54 22 32 40.7 437 202 235 46.2 0
Match Date League Team Court Partner Opponent(s) W/L Result Match Rating
10/22/2023 Adult 40+
4.0		 Team Iwai
Southwest		 D2 Keiji Iwai
(3.72) 		Gary Linden
(3.66)
Mark Carlson
(3.60) 		L 6-2
5-7
1-0		 3.44 3.50
10/22/2023 Adult 40+
4.0		 Team Iwai
Southwest		 D1 Keiji Iwai
(3.77) 		Timothy Weber
(3.72)
Mark Navarro
(3.70) 		L 6-1
6-1		 3.21 3.48
09/30/2023 Adult 40+
4.0		 Team Iwai
Southwest		 D3 rich stephens
(3.51) 		Andy Mraz
(3.66)
Matthew Mraz
(3.66) 		L 6-2
6-1		 3.33 3.54
09/23/2023 Mixed 40+
8.0
Sectionals		 NAZ/Malone/ mixed 40 and over/8.0
Southwest		 D2 Jana Perpich
(3.63) 		Henry Gallardo
(3.78)
Zulem Bordier
(3.58) 		L 7-5
7-6		 3.55 3.51
09/22/2023 Mixed 40+
8.0
Sectionals		 NAZ/Malone/ mixed 40 and over/8.0
Southwest		 D3 Tracy Schweitzer
(3.40) 		loredana Fitzpatrick
(4.03)
Jon Ashman
(3.57) 		L 6-1
6-2		 3.53 3.49
09/22/2023 Mixed 40+
8.0
Sectionals		 NAZ/Malone/ mixed 40 and over/8.0
Southwest		 D3 Jana Perpich
(3.55) 		Lisa Nelson
(3.60)
Krishna Goradia
(3.85) 		W 6-3
6-4		 3.82 3.54
09/10/2023 Adult 40+
4.0		 Team Iwai
Southwest		 D2 Robert Voytek
(3.47) 		Peter Ney
(3.97)
Gary Linden
(3.52) 		L 7-6
6-3		 S 3.56
09/10/2023 Adult 40+
4.0		 Team Iwai
Southwest		 D1 Robert Voytek
(3.47) 		Timothy Weber
(3.62)
Gary Linden
(-----) 		L 6-2
3-6
1-0		 S 3.56
09/02/2023 Adult 40+
4.0		 Team Iwai
Southwest		 D2 rich stephens
(3.51) 		Charles Mentken
(-----)
Jeff Champ
(3.80) 		W 7-6
6-3		 S 3.56
09/02/2023 Adult 40+
4.0		 Team Iwai
Southwest		 D2 Keiji Iwai
(3.75) 		Andy Mraz
(-----)
Matthew Mraz
(-----) 		L 6-4
7-6		 S 3.56
07/30/2023 Mixed 40+
8.0		 NAZ/Malone/ mixed 40 and over/8.0
Southwest		 D3 becky williams
(3.72) 		John Kolody
(3.51)
Lori Youngdahl
(3.65) 		W 6-1
2-6
1-0		 3.50 3.46
07/22/2023 Mixed 40+
8.0		 NAZ/Malone/ mixed 40 and over/8.0
Southwest		 D2 Jana Perpich
(3.55) 		Packy Baker
(3.58)
Kirsten Aamodt
(3.23) 		L 6-3
3-6
1-0		 S 3.43
06/24/2023 Mixed 40+
8.0		 NAZ/Malone/ mixed 40 and over/8.0
Southwest		 D3 becky williams
(3.63) 		Vanessa Scheu
(3.25)
John Kolody
(3.50) 		W 6-2
7-6		 3.40 3.43
06/24/2023 Mixed 40+
8.0		 NAZ/Malone/ mixed 40 and over/8.0
Southwest		 D2 Jana Perpich
(3.53) 		Craig Abney
(3.56)
Kirsten Aamodt
(3.14) 		L 2-6
6-2
1-0		 3.28 3.43
06/20/2023 Mixed 18+
8.0		 Team Schulz
Southwest		 D3 Jana Perpich
(3.53) 		Ian van Schilfgaarde
(3.93)
Riley Larson
(3.77) 		W 6-4
6-4		 S 3.47
06/13/2023 Mixed 18+
8.0		 Team Schulz
Southwest		 D3 Tracy Schweitzer
(3.49) 		Adam Nicol
(3.77)
Kim Vallen
(3.13) 		L 7-6
6-1		 3.29 3.47
06/11/2023 Tournament
NM4.0d		 Flagstaff Open - Adults C-S Keiji Iwai
(3.73) 		Ian van Schilfgaarde
(-----)
Ryan Stevens
(-----) 		L 2-6
6-4
1-0		 S -----
06/10/2023 Tournament
NM4.0d		 Flagstaff Open - Adults 16 Keiji Iwai
(3.73) 		John Fetherston
(-----)
Robert Perich
(-----) 		L 4-6
6-2
1-0		 S -----
06/08/2023 Mixed 18+
8.0		 Team Schulz
Southwest		 D2 Nancy Harris
(3.59) 		Nick DeBiasse
(3.69)
Parie Kerr
(3.52) 		L 6-3
6-1		 S 3.51
04/02/2023 Adult 18+
4.0		 Iwai/Kumasaka
Southwest		 D2 Robert Voytek
(3.50) 		Diego Constante
(3.54)
Steven Riggs
(3.64) 		L 6-4
6-2		 3.45 3.56
03/25/2023 Adult 18+
4.0		 Iwai/Kumasaka
Southwest		 D1 Keiji Iwai
(3.72) 		Diego Constante
(3.58)
james allen
(3.62) 		W 6-2
6-1		 3.86 3.62
03/04/2023 Adult 18+
4.0		 Iwai/Kumasaka
Southwest		 D2 Robert Voytek
(3.50) 		Link Paffenbarger
(3.56)
james allen
(3.62) 		W 7-6
6-2		 S 3.56
03/04/2023 Adult 18+
4.0		 Iwai/Kumasaka
Southwest		 D2 rich stephens
(3.60) 		Daniel Herrick
(3.99)
james allen
(4.07) 		L 1-6
6-3
1-0		 S 3.56
02/11/2023 Adult 18+
4.0		 Iwai/Kumasaka
Southwest		 D2 Robert Voytek
(3.51) 		Diego Constante
(3.57)
Link Paffenbarger
(3.59) 		W 2-6
7-6
1-0		 3.55 3.56
02/11/2023 Adult 18+
4.0		 Iwai/Kumasaka
Southwest		 D1 Keiji Iwai
(3.77) 		Craig Abney
(3.58)
Mark Navarro
(3.60) 		L 6-4
4-6
1-0		 3.46 3.55
10/22/2023 D2 Adult 40+
4.0
Team Iwai
Southwest		 L NAZ/Weber/40 and over/4.0M
Southwest
Keiji Iwai (3.72) 6-2
5-7
1-0		 Gary Linden (3.66)
Mark Carlson (3.60)
Match: 3.44 Rating: 3.50
10/22/2023 D1 Adult 40+
4.0
Team Iwai
Southwest		 L NAZ/Weber/40 and over/4.0M
Southwest
Keiji Iwai (3.77) 6-1
6-1		 Timothy Weber (3.72)
Mark Navarro (3.70)
Match: 3.21 Rating: 3.48
09/30/2023 D3 Adult 40+
4.0
Team Iwai
Southwest		 L Mentken's Maurader's
Southwest
rich stephens (3.51) 6-2
6-1		 Andy Mraz (3.66)
Matthew Mraz (3.66)
Match: 3.33 Rating: 3.54
09/23/2023 D2 Mixed 40+
8.0
Sectionals
NAZ/Malone/ mixed 40 and over/8.0
Southwest		 L GEPTA/Misssirian/40&over/8.0mx
Southwest
Jana Perpich (3.63) 7-5
7-6		 Henry Gallardo (3.78)
Zulem Bordier (3.58)
Match: 3.55 Rating: 3.51
09/22/2023 D3 Mixed 40+
8.0
Sectionals
NAZ/Malone/ mixed 40 and over/8.0
Southwest		 L PHX/BiceSmith/40XOver/8.0X
Southwest
Tracy Schweitzer (3.40) 6-1
6-2		 loredana Fitzpatrick (4.03)
Jon Ashman (3.57)
Match: 3.53 Rating: 3.49
09/22/2023 D3 Mixed 40+
8.0
Sectionals
NAZ/Malone/ mixed 40 and over/8.0
Southwest		 W NNM/Goradia/40 & Over Mixed/8.0
Southwest
Jana Perpich (3.55) 6-3
6-4		 Lisa Nelson (3.60)
Krishna Goradia (3.85)
Match: 3.82 Rating: 3.54
09/10/2023 D2 Adult 40+
4.0
Team Iwai
Southwest		 L NAZ/Weber/40 and over/4.0M
Southwest
Robert Voytek (3.47) 7-6
6-3		 Peter Ney (3.97)
Gary Linden (3.52)
Match: S Rating: 3.56
09/10/2023 D1 Adult 40+
4.0
Team Iwai
Southwest		 L NAZ/Weber/40 and over/4.0M
Southwest
Robert Voytek (3.47) 6-2
3-6
1-0		 Timothy Weber (3.62)
Gary Linden (-----)
Match: S Rating: 3.56
09/02/2023 D2 Adult 40+
4.0
Team Iwai
Southwest		 W Mentken's Maurader's
Southwest
rich stephens (3.51) 7-6
6-3		 Charles Mentken (-----)
Jeff Champ (3.80)
Match: S Rating: 3.56
09/02/2023 D2 Adult 40+
4.0
Team Iwai
Southwest		 L Mentken's Maurader's
Southwest
Keiji Iwai (3.75) 6-4
7-6		 Andy Mraz (-----)
Matthew Mraz (-----)
Match: S Rating: 3.56
07/30/2023 D3 Mixed 40+
8.0
NAZ/Malone/ mixed 40 and over/8.0
Southwest		 W Poco Locos
Southwest
becky williams (3.72) 6-1
2-6
1-0		 John Kolody (3.51)
Lori Youngdahl (3.65)
Match: 3.50 Rating: 3.46
07/22/2023 D2 Mixed 40+
8.0
NAZ/Malone/ mixed 40 and over/8.0
Southwest		 L Poco Locos
Southwest
Jana Perpich (3.55) 6-3
3-6
1-0		 Packy Baker (3.58)
Kirsten Aamodt (3.23)
Match: S Rating: 3.43
06/24/2023 D3 Mixed 40+
8.0
NAZ/Malone/ mixed 40 and over/8.0
Southwest		 W Poco Locos
Southwest
becky williams (3.63) 6-2
7-6		 Vanessa Scheu (3.25)
John Kolody (3.50)
Match: 3.40 Rating: 3.43
06/24/2023 D2 Mixed 40+
8.0
NAZ/Malone/ mixed 40 and over/8.0
Southwest		 L Poco Locos
Southwest
Jana Perpich (3.53) 2-6
6-2
1-0		 Craig Abney (3.56)
Kirsten Aamodt (3.14)
Match: 3.28 Rating: 3.43
06/20/2023 D3 Mixed 18+
8.0
Team Schulz
Southwest		 W NAZ/Ball/mixed 18&over/8.0
Southwest
Jana Perpich (3.53) 6-4
6-4		 Ian van Schilfgaarde (3.93)
Riley Larson (3.77)
Match: S Rating: 3.47
06/13/2023 D3 Mixed 18+
8.0
Team Schulz
Southwest		 L NAZ/Ball/mixed 18&over/8.0
Southwest
Tracy Schweitzer (3.49) 7-6
6-1		 Adam Nicol (3.77)
Kim Vallen (3.13)
Match: 3.29 Rating: 3.47
Flagstaff Open - Adults
06/11/2023 C-S Tournament
NM4.0d
L
Keiji Iwai (3.73) 2-6
6-4
1-0		 Ian van Schilfgaarde (-----)
Ryan Stevens (-----)
Match: S Rating: -----
Flagstaff Open - Adults
06/10/2023 16 Tournament
NM4.0d
L
Keiji Iwai (3.73) 4-6
6-2
1-0		 John Fetherston (-----)
Robert Perich (-----)
Match: S Rating: -----
06/08/2023 D2 Mixed 18+
8.0
Team Schulz
Southwest		 L NAZ/Ball/mixed 18&over/8.0
Southwest
Nancy Harris (3.59) 6-3
6-1		 Nick DeBiasse (3.69)
Parie Kerr (3.52)
Match: S Rating: 3.51
04/02/2023 D2 Adult 18+
4.0
Iwai/Kumasaka
Southwest		 L NAZ/Kolody/18&Over/4.0M
Southwest
Robert Voytek (3.50) 6-4
6-2		 Diego Constante (3.54)
Steven Riggs (3.64)
Match: 3.45 Rating: 3.56
03/25/2023 D1 Adult 18+
4.0
Iwai/Kumasaka
Southwest		 W NAZ/Kolody/18&Over/4.0M
Southwest
Keiji Iwai (3.72) 6-2
6-1		 Diego Constante (3.58)
james allen (3.62)
Match: 3.86 Rating: 3.62
03/04/2023 D2 Adult 18+
4.0
Iwai/Kumasaka
Southwest		 W NAZ/Kolody/18&Over/4.0M
Southwest
Robert Voytek (3.50) 7-6
6-2		 Link Paffenbarger (3.56)
james allen (3.62)
Match: S Rating: 3.56
03/04/2023 D2 Adult 18+
4.0
Iwai/Kumasaka
Southwest		 L NAZ/Kolody/18&Over/4.0M
Southwest
rich stephens (3.60) 1-6
6-3
1-0		 Daniel Herrick (3.99)
james allen (4.07)
Match: S Rating: 3.56
02/11/2023 D2 Adult 18+
4.0
Iwai/Kumasaka
Southwest		 W NAZ/Kolody/18&Over/4.0M
Southwest
Robert Voytek (3.51) 2-6
7-6
1-0		 Diego Constante (3.57)
Link Paffenbarger (3.59)
Match: 3.55 Rating: 3.56
02/11/2023 D1 Adult 18+
4.0
Iwai/Kumasaka
Southwest		 L NAZ/Kolody/18&Over/4.0M
Southwest
Keiji Iwai (3.77) 6-4
4-6
1-0		 Craig Abney (3.58)
Mark Navarro (3.60)
Match: 3.46 Rating: 3.55
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Rating Dynamic rating after completed match.
NC Match not yet calculated into rating.
S Self rated or unrated player involved in match so no match rating calculated for current player.
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