William Chamberlin · NorCal tennis rating

MatchPoint

Player profile

William Chamberlin

USTA 4.0 · NorCal league player

4.16

current

▼ −0.28 this season

Other formats · don’t affect your rating above

Combo 4.10Mixed 3.99

Active teams · 4

RAFAEL RC 40MX7.0B →2026 Mixed 40 & Over 7.0 RAFAEL RC 40MX8.0A →2026 Mixed 40 & Over 8.0 RAFAEL RC CM7.5A →2026 Combo Mens League 7.5

USTA4.00

2026

26 matches

Jan · 4.06

Jun · 4.16

Aug 29 · Doubles−0.06

L B. Arbios / T. Kincaid

4-6,2-6 · 2D · with Jason Bousquet

● Won ● Lost · Select a point to see that match.Your whole season is recalculated every night, so earlier points can shift as new results come in.

Current season

26 matches

Published NorCal results in 2026 — 15 scoring, 11 combo or mixed. Combo and mixed don’t affect NTRP ratings.

Aug 29, 2026 · Doubles · 2D · Combo

Lost 4-6,2-6

−0.06

William’s side

William ChamberlinCurrently on RAFAEL RC CM8.5A

4.10

Jason Bousquet(partner)Currently on RAFAEL RC CM8.5A

4.14

Opponents

Bryan ArbiosCurrently on ROHNERT PK TC/MAGNOLIA/M PK CM8.5A

4.41

Tom KincaidCurrently on WALNUT CREEK RC/Walnut Creek TC 40MX8.0C

4.53

Combo rating 4.16 → 4.10Doubles result

Combo results move their own rating, not your NTRP — USTA computes NTRP from adult singles and doubles only.

Aug 14, 2026 · Doubles · 1D · Mixed

Lost 4-6,6-7

−0.10

William’s side

William ChamberlinCurrently on RAFAEL RC CM8.5A

3.99

Sharon Klein(partner)Currently on RAFAEL RC CW8.5A

3.78

Opponents

Joe GulashCurrently on SCOTT VALLEY CM7.5A

4.16

Laura SpenceCurrently on SCOTT VALLEY CW8.5A

4.01

Mixed rating 4.09 → 3.99Doubles result

Mixed results move their own rating, not your NTRP — USTA computes NTRP from adult singles and doubles only.

Jul 12, 2026 · Doubles · Mixed

Won 6-7,6-3,1-0

+0.05

William’s side

William ChamberlinCurrently on RAFAEL RC CM8.5A

3.99

Sharon Klein(partner)Currently on RAFAEL RC CW8.5A

3.78

Opponents

Alima ConnanCurrently on NOVATO TC/PIONEER PK 40MX8.0A

3.34

Zach HancockCurrently on NOVATO TC/PIONEER PK CM7.5A

3.93

Mixed rating 4.04 → 4.09Doubles result

Mixed results move their own rating, not your NTRP — USTA computes NTRP from adult singles and doubles only.

Jul 10, 2026 · Doubles · Mixed

Won 4-6,6-3,1-0

+0.03

William’s side

William ChamberlinCurrently on RAFAEL RC CM8.5A

3.99

Sarah Hoffman(partner)Currently on RAFAEL RC CW8.5A

3.98

Opponents

Susan Bell-warnerCurrently on ROLLING HILLS 40MX8.0A

3.80

Mark LatimerCurrently on ROLLING HILLS CM7.5A

3.17

Mixed rating 4.01 → 4.04Doubles result

Mixed results move their own rating, not your NTRP — USTA computes NTRP from adult singles and doubles only.

Jul 5, 2026 · Doubles · Mixed

Won 6-4,6-2

+0.10

William’s side

William ChamberlinCurrently on RAFAEL RC CM8.5A

3.99

Sharon Klein(partner)Currently on RAFAEL RC CW8.5A

3.78

Opponents

Jennifer DoucetteCurrently on MARIN TC CW9.5B

3.99

Jody OsterweilCurrently on MARIN TC CM7.5A

3.26

Mixed rating 3.91 → 4.01Doubles result

Mixed results move their own rating, not your NTRP — USTA computes NTRP from adult singles and doubles only.

Jun 22, 2026 · Doubles · Mixed

Lost 2-6,2-6

−0.18

William’s side

William ChamberlinCurrently on RAFAEL RC CM8.5A

3.99

Kelly Schroth(partner)Currently on RAFAEL RC CW6.5A-DT

2.74

Opponents

Ethan DanielsCurrently on ROLLING HILLS 40MX8.0A

3.97

Carly DanielsCurrently on ROLLING HILLS CW6.5A

3.31

Mixed rating 4.09 → 3.91Doubles result

Mixed results move their own rating, not your NTRP — USTA computes NTRP from adult singles and doubles only.

Jun 21, 2026 · Doubles · Mixed

Lost 6-7,3-6

−0.13

William’s side

William ChamberlinCurrently on RAFAEL RC CM8.5A

3.99

Eileen Benson(partner)Currently on RAFAEL RC CW8.5A

3.89

Opponents

Josh JaffeCurrently on HARBOR PT 40MX8.0A

3.93

Erika LamarchCurrently on ROLLING HILLS CW7.5A-DT

4.18

Mixed rating 4.22 → 4.09Doubles result

Mixed results move their own rating, not your NTRP — USTA computes NTRP from adult singles and doubles only.

Jun 20, 2026 · Doubles · Mixed

Won 3-6,6-2,1-0

+0.02

William’s side

William ChamberlinCurrently on RAFAEL RC CM8.5A

3.99

Patty Beach(partner)Currently on RAFAEL RC CW6.5A-DT

3.08

Opponents

Jerry LabayCurrently on SCOTT VALLEY CM7.5A

3.58

Sharon McdanielCurrently on SCOTT VALLEY CW7.5A-DT

3.55

Mixed rating 4.19 → 4.22Doubles result

Mixed results move their own rating, not your NTRP — USTA computes NTRP from adult singles and doubles only.

Jun 14, 2026 · Doubles

Won 6-3,6-1

+0.04

William’s side

William ChamberlinCurrently on RAFAEL RC CM8.5A

4.16

Thomas Chang(partner)Currently on MARIN TC 40MX9.0A

3.98

Opponents

Jacob Colvin

3.51

Volodymyr Bosiuk

3.80

Rating 4.12 → 4.16Doubles result

Jun 6, 2026 · Doubles

Lost 1-6,1-6

−0.18

William’s side

William ChamberlinCurrently on RAFAEL RC CM8.5A

4.16

Michael S Rice(partner)

3.98

Opponents

Jason LytzCurrently on FLYTE RC CM8.5A

3.95

Tim RoseCurrently on FLYTE RC CM8.5A

4.05

Rating 4.30 → 4.12Doubles result

May 31, 2026 · Doubles

Won 6-4,6-1

+0.03

William’s side

William ChamberlinCurrently on RAFAEL RC CM8.5A

4.16

Sean Raymond(partner)Currently on RAFAEL RC CM8.5A

3.97

Opponents

Juanito GuzmanCurrently on MT TAM RC CM7.5A

3.72

David ThomasCurrently on MT TAM RC CM7.5A

3.70

Rating 4.27 → 4.30Doubles result

May 16, 2026 · Doubles

Lost 3-6,1-6

−0.13

William’s side

William ChamberlinCurrently on RAFAEL RC CM8.5A

4.16

Michael S Rice(partner)

3.98

Opponents

Nand JhaCurrently on FREMONT TC CM8.5B

4.08

Srikant KuppaCurrently on FREMONT TC CM8.5B

4.09

Rating 4.27 → 4.14Doubles result

May 16, 2026 · Doubles

Won 1-6,6-2,1-0

+0.13

William’s side

William ChamberlinCurrently on RAFAEL RC CM8.5A

4.16

Michael Grady(partner)Currently on RAFAEL RC CM8.5A

4.30

Opponents

Andrew HuangCurrently on SUNNYVALE MTC 40MX7.0F

4.14

Ryan LowCurrently on SUNNYVALE TC/SUNNYVALE MTC CM7.5C

4.24

Rating 4.14 → 4.27Doubles result

May 15, 2026 · Doubles

Won 6-4,6-3

+0.12

William’s side

William ChamberlinCurrently on RAFAEL RC CM8.5A

4.16

Michael Grady(partner)Currently on RAFAEL RC CM8.5A

4.30

Opponents

Dan GullionCurrently on WALNUT CREEK RC/Walnut Creek TC CM8.5B

4.07

Rodney WadeCurrently on BAY CLUB SANTA CLARA CM8.5A

4.02

Rating 4.15 → 4.27Doubles result

May 2, 2026 · Doubles

Won 6-4,6-2

+0.08

William’s side

William ChamberlinCurrently on RAFAEL RC CM8.5A

4.16

Tommy Hellyer(partner)Currently on RAFAEL RC CM8.5A

4.02

Opponents

Troy Pewitt

3.84

Matthew Ockner

3.93

Rating 4.07 → 4.15Doubles result

Apr 25, 2026 · Doubles

Lost 2-6,4-6

−0.19

William’s side

William ChamberlinCurrently on RAFAEL RC CM8.5A

4.16

Jason Bousquet(partner)Currently on RAFAEL RC CM8.5A

3.99

Opponents

Roark Vandien

4.03

Scott DaltonCurrently on MILL VALLEY CM8.5A

3.88

Rating 4.27 → 4.07Doubles result

Apr 17, 2026 · Doubles

Won 6-1,6-3

+0.15

William’s side

William ChamberlinCurrently on RAFAEL RC CM8.5A

4.16

Michael Grady(partner)Currently on RAFAEL RC CM8.5A

4.30

Opponents

Jason HolmesCurrently on MARIN TC CM8.5A

4.22

Michael LustenbergerCurrently on MARIN TC CM8.5A

3.98

Rating 4.12 → 4.27Doubles result

Apr 12, 2026 · Doubles

Won 6-3,6-0

+0.02

William’s side

William ChamberlinCurrently on RAFAEL RC CM8.5A

4.16

Michael Grady(partner)Currently on RAFAEL RC CM8.5A

4.30

Opponents

Robert Williard

3.67

Charlie Norman

3.67

Rating 4.09 → 4.12Doubles result

Apr 4, 2026 · Doubles

Won 6-1,6-0

+0.04

William’s side

William ChamberlinCurrently on RAFAEL RC CM8.5A

4.16

Tommy Hellyer(partner)Currently on RAFAEL RC CM8.5A

4.02

Opponents

Igor ScherbaCurrently on MARIN TC 55MX8.0B

3.65

Charles SpelmanCurrently on MARIN TC 55MX8.0B

3.70

Rating 4.05 → 4.09Doubles result

Feb 28, 2026 · Doubles · Mixed

Lost 4-6,3-6

−0.10

William’s side

William ChamberlinCurrently on RAFAEL RC CM8.5A

3.99

Kate Mcmillan(partner)Currently on RAFAEL RC CW8.5A

4.06

Opponents

Keith ListerCurrently on BELVEDERE TC CM7.5A

3.97

Toby Peelle

4.28

Mixed rating 4.30 → 4.19Doubles result

Mixed results move their own rating, not your NTRP — USTA computes NTRP from adult singles and doubles only.

Feb 21, 2026 · Doubles

Won 7-6,6-1

+0.04

William’s side

William ChamberlinCurrently on RAFAEL RC CM8.5A

4.16

Jeff Marquis(partner)Currently on RAFAEL RC CM8.5A

4.11

Opponents

Toby TylerCurrently on ROLLING HILLS CM8.5A

3.57

Peter HalpernCurrently on ROLLING HILLS CM8.5A

3.67

Rating 4.12 → 4.16Doubles result

Feb 21, 2026 · Doubles

Lost 3-6,6-3,0-1

−0.10

William’s side

William ChamberlinCurrently on RAFAEL RC CM8.5A

4.16

Britt Doyle(partner)Currently on HARBOR PT 40MX9.0A

4.04

Opponents

Geoffrey GerdingCurrently on FLYTE RC CM8.5A

4.32

Jason LytzCurrently on FLYTE RC CM8.5A

3.95

Rating 4.16 → 4.05Doubles result

Jan 24, 2026 · Doubles · Mixed

Won 6-3,7-6

+0.05

William’s side

William ChamberlinCurrently on RAFAEL RC CM8.5A

3.99

Kelly Mcgeehan(partner)Currently on ZEPHYR COVE 40MX8.0A

4.03

Opponents

Shannon RajewskiCurrently on MT TAM RC CW7.5A

3.61

Miguel PoolCurrently on NOVATO TC/PIONEER PK CM7.5A

3.57

Mixed rating 4.25 → 4.30Doubles result

Mixed results move their own rating, not your NTRP — USTA computes NTRP from adult singles and doubles only.

Jan 18, 2026 · Doubles

Lost 2-6,4-6

−0.05

William’s side

William ChamberlinCurrently on RAFAEL RC CM8.5A

4.16

Nathaniel Ahearn(partner)

4.37

Opponents

Nick OpderbeckCurrently on FLYTE RC CM8.5A

4.47

Sacha DrazienCurrently on HARBOR PT 40MX9.0A

4.44

Rating 4.17 → 4.12Doubles result

Jan 17, 2026 · Doubles · Mixed

Lost 1-6,6-4,0-1

−0.13

William’s side

William ChamberlinCurrently on RAFAEL RC CM8.5A

3.99

Sharon Klein(partner)Currently on RAFAEL RC CW8.5A

3.78

Opponents

Gary Russillo

3.74

Susan SwezyCurrently on MARIN TC CW8.5A

3.97

Mixed rating 4.39 → 4.25Doubles result

Mixed results move their own rating, not your NTRP — USTA computes NTRP from adult singles and doubles only.

Jan 10, 2026 · Doubles

Won 6-3,6-4

+0.11

William’s side

William ChamberlinCurrently on RAFAEL RC CM8.5A

4.16

Paul Mcgeehan(partner)Currently on ZEPHYR COVE 40MX8.0A

4.05

Opponents

Douglas De SalvoCurrently on ROLLING HILLS CM8.5A

3.78

Ethan DanielsCurrently on ROLLING HILLS 40MX8.0A

4.16

Rating 4.06 → 4.17Doubles result

Best match

+0.15

Apr 17 vs J. Holmes / M. Lustenberger

Worst match

−0.19

Apr 25 vs R. Vandien / S. Dalton

Where you started ›4.44

2022 year-end NTRP 4.54.30

Scale calibration+0.14

Season start4.44

Your starting point comes from your official year-end NTRP, not from any third-party rating. The calibration is a fixed shift that puts our scale on the same level as NTRP.

▲

Combo and mixed matches aren’t included. This rating is built from standard men’s and women’s league play only — combo and mixed results feed your separate combo/mixed ratings, not this one.

Updated Sep 20

William Chamberlin’s MatchPoint NorCal tennis rating is 4.16, an independent estimate based on published NorCal league results through September 20, 2026. They are currently rostered on 4 active NorCal league teams.

MatchPoint ratings are estimates based on published USTA NorCal league results. Data through September 20, 2026.

Year-end re-anchoring

Pulled toward the 2024 year-end level+0.094.53

Pulled toward the 2025 year-end level+0.144.06

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