Kao, William

USTA ID

920215780

Gender

Male

Location

Medinah, IL

WTN ID

KAO3420386

TennisLink · USTA · WTN

NTRP Ratings

Rating	Type	Year	Date	Expires
3.5	C	2025	Dec. 31, 2025	Dec. 31, 2027

WTN Ratings

Doubles

26.83

Confidence 50 · 25.1–28.6

Position Distribution

Men's Combo 4.0

17 matches

1# Doubles

4 (24%)

2# Doubles

10 (59%)

3# Doubles

3 (18%)

Men's Doubles 7.0

30 matches

1# Doubles

18 (60%)

2# Doubles

9 (30%)

3# Doubles

3 (10%)

Men's Doubles 8.0

25 matches

1# Doubles

6 (24%)

2# Doubles

6 (24%)

3# Doubles

13 (52%)

Partners

Partner	W	L	xW	Together
James Cohick	4	12	6.1	16
Alfred Ramirez	3	3	3.6	6
Guy Jang	2	2	2.2	4
David MacK	3	0	1.8	3
Greg Waas	0	3	1.1	3
Jens Borchert	2	1	1.0	3
Jeffrey Porto	2	0	1.4	2
Howard Gartzman	2	0	1.5	2
John van Duzer	2	0	1.2	2
Steve Franks	2	0	0.8	2
James Engel	2	0	1.3	2
Chris Gair	2	0	1.0	2
Phil Frederickson	0	2	0.7	2
Thomas Williams	1	1	0.7	2
Viji John	0	2	0.6	2
Tom Sweeney	0	2	0.8	2
HENRY ANDOR	0	2	0.3	2
Richard McLean	1	0	0.3	1
Matthew Newman	1	0	0.3	1
Doug Poder	1	0	0.5	1
Robert Senft	0	1	0.4	1
Craig Zeigler	0	1	0.1	1
John Crowe	0	1	0.2	1
Paul Kessenich	0	1	0.4	1
Carl Good	0	1	0.4	1
David Chopp	1	0	0.7	1
Robert Barry	1	0	0.5	1
Elliot Greenberg	0	1	0.5	1
Damian Marshall	0	1	0.2	1
Keith Mills	1	0	0.3	1
Robert Block	1	0	0.7	1
Vince Bacote	1	0	0.5	1

Opponents

Opponent	W	L	xW	Faced
Richard McLean	4	0	2.0	4
Jeffrey Porto	3	0	1.8	3
Robert Barry	3	0	1.8	3
Paul Zuffa	0	3	0.8	3
John Reece	2	1	1.5	3
Randy Curtis	0	3	0.9	3
Bob Bean	0	3	1.7	3
David Chopp	0	3	0.6	3
Jeff Skummer	1	1	1.2	2
Andrew Pappas	2	0	1.0	2
Daniel Robin	2	0	0.8	2
Anthony Fiordaliso	1	1	1.0	2
Mark MacDonald	1	1	1.1	2
John van Duzer	2	0	0.8	2
Chuck Zitnick	2	0	0.8	2
Eric Esancy	2	0	1.3	2
Carlos Flores	0	2	0.5	2
Bruce Thornquist	0	2	0.5	2
Alan Halleck	1	1	1.1	2
John Gatz	1	1	0.4	2
Russell Needler	0	2	0.5	2
Patrick Seermon	0	2	0.5	2
Jay Goldner	0	2	0.8	2
Peter Brecknock	0	2	0.6	2
Mark Crompton	1	1	1.2	2
Ira Lathan	2	0	1.3	2
Michael Bryant	0	2	0.5	2
Michael Hong	1	1	0.8	2
David Degroot	0	2	0.8	2
Rich Cobb	2	0	1.4	2
Len Gervasi	2	0	1.4	2
Gregory Franzo	1	0	0.7	1
Joseph Castriano	1	0	0.8	1
Howard Braun	1	0	0.8	1
Phil Debuhr	1	0	0.6	1
Donald Roubitchek	1	0	0.7	1
Arinze Egbuna	1	0	0.3	1
Stephen Jones	1	0	0.3	1
Andrew Rubanovich	1	0	0.5	1
Neal Johnson	1	0	0.4	1
Curtis Baddeley	1	0	0.6	1
Harold Krent	0	1	0.7	1
Dal Bristow	1	0	0.6	1
David Kaufman	1	0	0.3	1
Rick Aguayo	0	1	0.3	1
Jim Fine	1	0	0.4	1
Marc Pelini	1	0	0.4	1
Steve Yoon	1	0	0.5	1
Sathish Ponneboina	1	0	0.5	1
Dave Carlquist	0	1	0.4	1
Ivaylo Peroussanov	0	1	0.4	1
Felix Borges	0	1	0.1	1
Scott Modica	0	1	0.2	1
John Compton	1	0	0.6	1
Jim Rowe	1	0	0.6	1
John Griffin	1	0	0.7	1
Craig Hagerman	1	0	0.7	1
Shawn Erickson	0	1	0.4	1
Greg Tevonian	0	1	0.2	1
Jeff Callen	0	1	0.5	1
William Strickley	0	1	0.5	1
Sean Conboy	0	1	0.3	1
Charles Schinzer	0	1	0.3	1
SEAN YANG	1	0	0.6	1
Tony Mateja	1	0	0.6	1
Joseph Lyden	0	1	0.4	1
Bill Dannacher	0	1	0.4	1
Douglas Anderson	0	1	0.3	1
Tim Schreiber	0	1	0.6	1
Keith Sgariglia	0	1	0.6	1
Brett Wangman	0	1	0.4	1
Felix Danciu	0	1	0.4	1
Allen Goodman	0	1	0.4	1
Dean Stermer	0	1	0.4	1
Jay Freedman	0	1	0.3	1
Peter Krizman	0	1	0.4	1
David Maxson	1	0	0.6	1
John Bicek	1	0	0.6	1
Nick Paterakos	1	0	0.5	1
Robert Wheeler III	0	1	0.5	1
Jawad Hussain	0	1	0.4	1
Bob King	1	0	0.2	1
Bob Schnoll	0	1	0.2	1
Thomas Gilbertson	0	1	0.2	1
Chris Boruff	0	1	0.2	1
Gregory Adams	0	1	0.2	1
Jose Cheriyampurathu	1	0	0.3	1
James Engel	1	0	0.3	1
Scott Smith	1	0	0.6	1
Michael Brailov	1	0	0.6	1
Matthew Newman	0	1	0.5	1
Chris Goedde	0	1	0.5	1
Nick Kouvelis	1	0	0.7	1
Dwight Janzen	0	1	0.6	1
James Jones	0	1	0.6	1
Reid Adler	0	1	0.3	1
Clyde Woods	0	1	0.3	1
Rafael Lozada	0	1	0.1	1
Paul Leonardo	0	1	0.2	1
Rex J Lao	0	1	0.2	1
Harinath Rachapalli	1	0	0.8	1
Geoffrey Butler	1	0	0.5	1

Match History (72)

Date	Flight	Pos	Partner	Opponent(s)	Score	P(win)	Result
8/11/2024	55 & over M 7.0 Summer	1# Doubles	Jeffrey Porto	Jeff Skummer / Gregory Franzo	6-4 5-6 1-0	72%	W
8/4/2024	65 & Over M 7.0	1# Doubles	Howard Gartzman	Jeffrey Porto / Robert Barry	6-0 6-4	74%	W
8/3/2024	55 & over M 7.0 Summer	2# Doubles	David MacK	Joseph Castriano / Howard Braun	1-6 6-4 1-0	75%	W
7/31/2024	55 & over M 7.0 Summer	2# Doubles	David MacK	Richard McLean / Andrew Pappas	4-6 6-4 1-0	55%	W
7/14/2024	65 & Over M 7.0	1# Doubles	John van Duzer	Jeffrey Porto / Richard McLean	7-6 6-7 1-0	59%	W
6/16/2024	65 & Over M 7.0	1# Doubles	John van Duzer	Robert Barry / Phil Debuhr	6-2 7-6	59%	W
6/9/2024	65 & Over M 7.0	1# Doubles	Howard Gartzman	Donald Roubitchek / Richard McLean	6-2 7-5	71%	W
4/21/2024	55 & Over M 7.0 Winter	2# Doubles	Steve Franks	Arinze Egbuna / Stephen Jones	2-6 6-0 1-0	34%	W
4/7/2024	65 & Over M 7.0 winter	3# Doubles	David MacK	Andrew Rubanovich / Daniel Robin	6-1 7-5	53%	W
3/24/2024	55 & Over M 7.0 Winter	1# Doubles	Steve Franks	Robert Barry / Neal Johnson	7-6 6-1	43%	W
3/10/2024	40 & Over M 4.0 Winter	1# Doubles	James Engel	Anthony Fiordaliso / Curtis Baddeley	6-7 5-3 1-0	60%	W
2/18/2024	65 & Over M 7.0 winter	1# Doubles	Alfred Ramirez	Mark MacDonald / Harold Krent	7-5 5-2	67%	L
1/28/2024	65 & Over M 7.0 winter	1# Doubles	Alfred Ramirez	John van Duzer / Chuck Zitnick	6-3 6-1	48%	W
12/10/2023	65&O Men 7.0 (NO TRANSFERS)	1# Doubles	Richard McLean	Chuck Zitnick / John van Duzer	6-2 6-3	34%	W
12/3/2023	55&O Men 7.0	2# Doubles	Jeffrey Porto	Dal Bristow / Eric Esancy	6-4 3-6 1-0	65%	W
12/2/2023	65&O Men 7.0 (NO TRANSFERS)	3# Doubles	Matthew Newman	David Kaufman / Daniel Robin	6-3 6-3	28%	W
10/29/2023	40&O Men 4.0	2# Doubles	Greg Waas	Rick Aguayo / Paul Zuffa	6-2 6-4	32%	L
10/22/2023	55&O Men 7.0	3# Doubles	Chris Gair	Jim Fine / Marc Pelini	3-6 6-4 1-0	39%	W
10/7/2023	40&O Men 4.0	3# Doubles	Doug Poder	Steve Yoon / Sathish Ponneboina	6-4 1-6 1-0	53%	W
9/24/2023	55&O Men 7.0	2# Doubles	Robert Senft	Dave Carlquist / Ivaylo Peroussanov	6-4 6-1	41%	L
9/23/2023	40&O Men 4.0	2# Doubles	Craig Zeigler	Carlos Flores / Felix Borges	6-3 6-2	12%	L
8/20/2023	55 & over Men 8.0	2# Doubles	Guy Jang	Bruce Thornquist / Scott Modica	6-1 7-5	23%	L
8/6/2023	55 & Over Men 7.0	1# Doubles	Chris Gair	John Compton / Jim Rowe	6-0 6-3	56%	W
7/23/2023	55 & over Men 8.0	3# Doubles	James Engel	John Griffin / Craig Hagerman	6-0 6-7 1-0	70%	W
7/16/2023	55 & Over Men 7.0	2# Doubles	Phil Frederickson	Shawn Erickson / Alan Halleck	6-2 6-4	44%	L
7/9/2023	55 & over Men 8.0	3# Doubles	John Crowe	John Gatz / Greg Tevonian	7-5 6-3	17%	L
6/25/2023	55 & over Men 8.0	3# Doubles	James Cohick	Jeff Callen / William Strickley	7-5 6-4	46%	L
5/21/2023	55 & Over Men 7.0	2# Doubles	Phil Frederickson	Sean Conboy / Charles Schinzer	4-6 6-1 1-0	29%	L
4/30/2023	40 & Over M 4.0 Winter	2# Doubles	Thomas Williams	John Gatz / John Reece	6-4 6-2	26%	W
4/16/2023	40 & Over M 4.0 Winter	1# Doubles	James Cohick	SEAN YANG / Tony Mateja	6-3 0-6 1-0	59%	W
3/26/2023	40 & Over M 4.0 Winter	1# Doubles	Thomas Williams	Anthony Fiordaliso / Joseph Lyden	4-6 7-5 1-0	41%	L
3/18/2023	40 & Over M 4.0 Winter	2# Doubles	James Cohick	Russell Needler / Paul Zuffa	6-1 6-3	27%	L
3/12/2023	55 & Over M 8.0 Winter	3# Doubles	Viji John	Jeff Skummer / Bill Dannacher	6-1 6-2	44%	L
3/5/2023	55 & Over M 8.0 Winter	1# Doubles	James Cohick	Patrick Seermon / Douglas Anderson	6-2 6-3	31%	L
2/19/2023	40 & Over M 4.0 Winter	2# Doubles	Greg Waas	Tim Schreiber / Keith Sgariglia	6-4 6-3	58%	L
2/11/2023	40 & Over M 4.0 Winter	2# Doubles	James Cohick	Brett Wangman / Carlos Flores	6-1 6-4	35%	L
2/5/2023	40 & Over M 4.0 Winter	1# Doubles	James Cohick	Felix Danciu / Allen Goodman	2-6 7-5 1-0	43%	L
1/22/2023	55 & Over M 8.0 Winter	1# Doubles	James Cohick	Jay Goldner / Bruce Thornquist	6-4 6-4	26%	L
11/20/2022	55&O M 8.0	1# Doubles	Paul Kessenich	Randy Curtis / Dean Stermer	6-3 6-4	37%	L
11/13/2022	55&O M 8.0	1# Doubles	James Cohick	Randy Curtis / Jay Freedman	6-0 6-1	35%	L
10/30/2022	55&O M 8.0	3# Doubles	Carl Good	Peter Krizman / Peter Brecknock	6-2 6-4	42%	L
10/29/2022	55&O M 8.0	3# Doubles	David Chopp	Mark Crompton / Ira Lathan	4-6 6-4 1-0	73%	W
10/23/2022	55&O M 8.0	3# Doubles	Guy Jang	Bob Bean / Jay Goldner	6-1 6-1	59%	L
10/16/2022	55&O M 8.0	3# Doubles	James Cohick	David Maxson / Eric Esancy	7-5 6-2	63%	W
8/17/2022	55 & over M 8.0 Summer	2# Doubles	Guy Jang	John Bicek / Ira Lathan	6-0 6-4	59%	W
8/14/2022	55 & over M 7.0 Summer	1# Doubles	Robert Barry	Andrew Pappas / Nick Paterakos	6-4 1-6 1-0	46%	W
7/25/2022	55 & over M 8.0 Summer	3# Doubles	Elliot Greenberg	Bob Bean / Robert Wheeler III	6-4 6-2	47%	L
7/24/2022	55 & over M 8.0 Summer	3# Doubles	Viji John	David Chopp / Michael Bryant	6-3 7-6	16%	L
7/17/2022	40 & Over M 4.0 Summer	3# Doubles	Tom Sweeney	Jawad Hussain / Michael Hong	6-4 2-6 1-0	41%	L
7/11/2022	55 & over M 7.0 Summer	1# Doubles	Jens Borchert	Bob King / Richard McLean	3-6 6-2 1-0	19%	W
6/11/2022	40 & Over M 4.0 Summer	2# Doubles	James Cohick	Jeffrey Porto / Michael Hong	7-6 6-4	44%	W
6/5/2022	40 & Over M 4.0 Summer	2# Doubles	Greg Waas	Bob Schnoll / Paul Zuffa	6-4 6-4	21%	L
6/2/2022	40 & Over M 4.0 Summer	2# Doubles	Tom Sweeney	Mark Crompton / John Reece	7-6 4-6 1-0	42%	L
5/22/2022	55 & over M 8.0 Summer	1# Doubles	James Cohick	Randy Curtis / Thomas Gilbertson	7-5 6-2	15%	L
3/27/2022	55 & Over M 8.0 Winter	2# Doubles	Damian Marshall	Patrick Seermon / David Degroot	6-4 3-6 1-0	21%	L
3/20/2022	55 & Over M 8.0 Winter	1# Doubles	James Cohick	Chris Boruff / Gregory Adams	6-3 3-6 1-0	19%	L
3/6/2022	55 & Over M 7.0 Winter	2# Doubles	Keith Mills	Jose Cheriyampurathu / James Engel	7-5 4-3	30%	W
2/26/2022	55 & Over M 7.0 Winter	2# Doubles	Jens Borchert	Scott Smith / Michael Brailov	6-4 6-1	55%	W
2/20/2022	55 & Over M 7.0 Winter	1# Doubles	Alfred Ramirez	Matthew Newman / Chris Goedde	4-6 7-5 1-0	54%	L
2/13/2022	55 & Over M 7.0 Winter	1# Doubles	Alfred Ramirez	Alan Halleck / Nick Kouvelis	6-1 6-2	69%	W
2/6/2022	65 & Over M 7.0 winter	1# Doubles	Robert Block	Rich Cobb / Len Gervasi	7-5 6-2	70%	W
1/30/2022	65 & Over M 7.0 winter	1# Doubles	Alfred Ramirez	Rich Cobb / Len Gervasi	6-1 6-2	67%	W
1/23/2022	65 & Over M 7.0 winter	1# Doubles	Alfred Ramirez	Dwight Janzen / James Jones	7-6 3-6 1-0	57%	L
1/16/2022	55 & Over M 7.0 Winter	1# Doubles	Jens Borchert	Reid Adler / Clyde Woods	2-6 5-2 1-0	29%	L
1/16/2022	55 & Over M 8.0 Winter	3# Doubles	James Cohick	Russell Needler / Peter Brecknock	6-2 3-6 1-0	20%	L
1/9/2022	55 & Over M 8.0 Winter	3# Doubles	Vince Bacote		6-0 6-0		W
12/5/2021	55&O 8.0 Men	2# Doubles	James Cohick	Bob Bean / David Degroot	6-3 6-4	61%	L
11/14/2021	40&O 4.0 Men	3# Doubles	HENRY ANDOR	David Chopp / Rafael Lozada	6-3 7-5	9%	L
10/31/2021	55&O 8.0 Men	2# Doubles	James Cohick	David Chopp / Michael Bryant	7-5 6-2	35%	L
10/24/2021	40&O 4.0 Men	2# Doubles	HENRY ANDOR	Paul Leonardo / Rex J Lao	6-4 6-2	22%	L
9/26/2021	55&O 8.0 Men	2# Doubles	Guy Jang	John Reece / Harinath Rachapalli	6-4 7-6	81%	W
9/19/2021	55&O 8.0 Men	3# Doubles	James Cohick	Mark MacDonald / Geoffrey Butler	4-6 6-3 1-0	47%	W

Team History

Year	Flight	Team	Role
2024	CDTA 55 & over M 7.0 Summer	CDTA S 55&OM7.0 5.Wheaton Mills Sun 2 $20
2024	CDTA 65 & Over M 7.0	CDTA S 65&OM7.0 1.Tam Spangler Sun 11 $22
2024	CDTA 40 & Over M 4.0 Winter	CDTA W 40&OM4.0 5.Centre Court Zeigler Sun 12 $20
2024	CDTA 55 & Over M 7.0 Winter	CDTA W 55&OM7.0 6.Centennial Woods Sun 7 $25
2024	CDTA 65 & Over M 7.0 winter	CDTA W 65&OM7.0 1.Wheaton Mills Sun 12 $20
2024	CDTA E 40&O Men 4.0	CDTA E 40&OM4.0 6.Centre Court Zeigler Sun 12 $20
2024	CDTA E 55&O Men 7.0	CDTA E 55&OM7.0 6.Wheaton Mills Sun 2 $20
2024	CDTA E 65&O Men 7.0 (NO TRANSFERS)	CDTA E 65&OM7.0 1.Wheaton Mills Sun 12 $20
2023	CDTA ESL 55&O M 8.0	CDTA E 55&O M8.0 Centre Court Cohick Sun 2 $20	Captain
2023	CDTA S 55 & Over Men 7.0	CDTA S 55&OM7.0 d.Wheaton(OUT) Mills Sun 2 $20
2023	CDTA S 55 & over Men 8.0	CDTA S 55&OM8.0 a.Centre Court Kao Sun 2 $20	Captain
2023	CDTA 40 & Over M 4.0 Winter	CDTA W 40&O 4.0M Centre Court Hanford Sun 12 $20
2023	CDTA 55 & Over M 8.0 Winter	CDTA W 55&O 8.0M Centre Court Cohick Sun 2 $20	Captain
2022	CDTA ESL 40&O W/E 4.0 Men	CDTA E 40&O W/E 4.0M Centre Court Hanford Sun 12 $20
2022	CDTA ESL 55&O W/E 8.0 Men	CDTA E 55&O W/E 8.0M Centre Court Cohick Sun 2:30 $20	Captain
2022	CDTA 40 & Over M 4.0 Summer	CDTA S 40&O 4.0M Centre Court Hanford Sun 12 $20
2022	CDTA 55 & over M 7.0 Summer	CDTA S 55&O 7.0M Wheaton Mills Sun 2 $17
2022	CDTA 55 & over M 8.0 Summer	CDTA S 55&O 8.0M Centre Court Cohick Sun 2 $20	Captain
2022	CDTA 55 & Over M 7.0 Winter	CDTA W 55&O 7.0M Wheaton Mills Sun 2 $17
2022	CDTA 55 & Over M 8.0 Winter	CDTA W 55&O 8.0M Centre Court Cohick Sun 2 $20	Captain
2022	CDTA 65 & Over M 7.0 winter	CDTA W 65&O 7.0M Wheaton Mills Sun 12 $17