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Player profile

Heidi Corkern: estimated dynamic rating

Heidi Corkern
USTA3.5
Diablo CC
3.33
Estimated dynamic rating
▼ −0.01 this season
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Combo · 2026
8 matches
3.313.183.05
Aug · 3.11
Oct · 3.12
Oct 27 · Doubles−0.05
L K. Giori / C. Belcastro
1-6,3-6 · 2D · with Alexis Bybel
Your combo rating, from combo matches only. It doesn’t move your 3.33.● Won ● Lost · Select a point to see that match.Your whole season is recalculated daily, so earlier points can shift as new results come in.

Current season

18 matches

Published NorCal results in 2026 — 10 scoring, 8 combo or mixed. Combo and mixed don’t affect NTRP ratings.

Oct 27, 2026 · Doubles · 2D · Combo

Lost 1-6,3-6
−0.05

Heidi’s side

Heidi CorkernCurrently on DIABLO CC CW7.5A-DT
3.12
Alexis Bybel(partner)Currently on DIABLO CC CW7.5A-DT
2.92

Opponents

Katie GioriCurrently on WALNUT CREEK RC/Walnut Creek TC CW6.5B
3.60
Christy BelcastroCurrently on ST MARY CW7.5A-DT
3.42
Combo rating 3.18 → 3.12Doubles result

Oct 19, 2026 · Doubles · 3D · Combo

Lost 2-6,1-6
−0.07

Heidi’s side

Heidi CorkernCurrently on DIABLO CC CW7.5A-DT
3.12
Michelle Gherlone(partner)Currently on DIABLO CC CW6.5A-DT
2.95

Opponents

Reshma KrishnaCurrently on STONEBRAE CC CW6.5A-DT
3.56
Juan WuCurrently on BAY CLUB PL CW6.5B-DT
3.30
Combo rating 3.25 → 3.18Doubles result

Oct 15, 2026 · Doubles · 3D · Combo

Won 6-1,6-2
+0.03

Heidi’s side

Heidi CorkernCurrently on DIABLO CC CW7.5A-DT
3.12
Melissa Kapulica(partner)Currently on DIABLO CC CW6.5A-DT
2.98

Opponents

Phyllis LeeCurrently on BAY CLUB PL CW6.5B-DT
2.82
Cindy EldridgeCurrently on CASTLEWOOD CC CW6.5A
2.29
Combo rating 3.22 → 3.25Doubles result

Oct 1, 2026 · Doubles · 2D · Combo

Lost 7-5,0-6,0-1
−0.09

Heidi’s side

Heidi CorkernCurrently on DIABLO CC CW7.5A-DT
3.12
Kirsten Miks(partner)Currently on WALNUT CREEK RC/Walnut Creek TC CW7.5B
3.23

Opponents

Allyson GarciaCurrently on WALNUT CREEK RC/Walnut Creek TC CW8.5A
4.20
Megan ThomasCurrently on WALNUT CREEK RC/Walnut Creek TC CW6.5A-DT
2.97
Combo rating 3.31 → 3.22Doubles result

Sep 22, 2026 · Doubles · 1D · Combo

Won 3-6,7-5,1-0
+0.16

Heidi’s side

Heidi CorkernCurrently on DIABLO CC CW7.5A-DT
3.12
Sarah Bantz(partner)Currently on DIABLO CC CW6.5A-DT
3.21

Opponents

Diem NguyenCurrently on PLEASANTON CW7.5A-DT
3.54
Julie LoweCurrently on PLEASANTON 55MX7.0B
3.20
Combo rating 3.15 → 3.31Doubles result

Sep 17, 2026 · Doubles · 1D · Combo

Lost 5-7,3-6
−0.05

Heidi’s side

Heidi CorkernCurrently on DIABLO CC CW7.5A-DT
3.12
Melissa Kapulica(partner)Currently on DIABLO CC CW6.5A-DT
2.98

Opponents

Dorita CastillanoCurrently on MT EDEN T AND S CLUB/VETERANS MEM PK CW6.5A
3.27
Christine StartCurrently on WALNUT CREEK RC/Walnut Creek TC CW6.5C
3.55
Combo rating 3.20 → 3.15Doubles result

Sep 16, 2026 · Doubles · 3D · Combo

Won 6-0,3-6,1-0
+0.15

Heidi’s side

Heidi CorkernCurrently on DIABLO CC CW7.5A-DT
3.12
Veronica Butcher(partner)Currently on DIABLO CC CW7.5A-DT
3.52

Opponents

Dana KrugerCurrently on CROW CANYON CC CW7.5A-DT
3.12
Heather BrownCurrently on WALNUT CREEK RC/Walnut Creek TC CW7.5B
3.62
Combo rating 3.05 → 3.20Doubles result

May 14, 2026 · Doubles

Won 7-5,7-5
+0.06

Heidi’s side

Heidi CorkernCurrently on DIABLO CC CW7.5A-DT
3.33
Sia Mcdonald(partner)Currently on DIABLO CC CW7.5A-DT
3.34

Opponents

Florence HuangCurrently on WALNUT COUNTRY HOA 55MX7.0A
3.12
Patty LyCurrently on MONTE VISTA HS CW6.5A
3.03
Rating 3.27 → 3.33Doubles result

Apr 18, 2026 · Doubles

Won 4-6,6-3,1-0
+0.08

Heidi’s side

Heidi CorkernCurrently on DIABLO CC CW7.5A-DT
3.33
Rochelle Rich(partner)Currently on DIABLO CC CW7.5A-DT
3.30

Opponents

Amy BullCurrently on PLEASANTON CW6.5A
3.35
Melissa SanoCurrently on PLEASANTON CW7.5B
3.07
Rating 3.18 → 3.26Doubles result

Mar 14, 2026 · Doubles

Lost 5-7,5-7
−0.09

Heidi’s side

Heidi CorkernCurrently on DIABLO CC CW7.5A-DT
3.33
Nancy Daetz(partner)Currently on DIABLO CC CW7.5A-DT
3.19

Opponents

Sanna GarciaCurrently on MONTE VISTA HS CW7.5A
3.27
Jessica VasishtCurrently on MONTE VISTA HS CW7.5A
3.45
Rating 3.27 → 3.18Doubles result

Mar 3, 2026 · Doubles

Won 6-2,6-2
+0.05

Heidi’s side

Heidi CorkernCurrently on DIABLO CC CW7.5A-DT
3.33
Lindsay Walker(partner)Currently on DIABLO CC CW6.5A-DT
3.25

Opponents

Yulia CostelloCurrently on STONEBRAE CC CW6.5A-DT
2.96
Traci RebiejoCurrently on WALNUT CREEK RC/Walnut Creek TC CW6.5B
2.70
Rating 3.22 → 3.27Doubles result

Jan 31, 2026 · Doubles

Won 6-3,6-4
+0.12

Heidi’s side

Heidi CorkernCurrently on DIABLO CC CW7.5A-DT
3.33
Lindsay Walker(partner)Currently on DIABLO CC CW6.5A-DT
3.25

Opponents

Diane ChinnCurrently on THE CLUB @LIVERMORE CW7.5A
3.25
Pensri WalshCurrently on RUBY HILL GC CW7.5A-DT
3.39
Rating 3.16 → 3.28Doubles result

Jan 22, 2026 · Doubles

Won 3-6,6-1,1-0
+0.12

Heidi’s side

Heidi CorkernCurrently on DIABLO CC CW7.5A-DT
3.33
Nancy Daetz(partner)Currently on DIABLO CC CW7.5A-DT
3.19

Opponents

Florence HuangCurrently on WALNUT COUNTRY HOA 55MX7.0A
3.12
Sanna GarciaCurrently on MONTE VISTA HS CW7.5A
3.27
Rating 3.03 → 3.16Doubles result

Jan 21, 2026 · Doubles

Lost 3-6,4-6
−0.14

Heidi’s side

Heidi CorkernCurrently on DIABLO CC CW7.5A-DT
3.33
Rochelle Rich(partner)Currently on DIABLO CC CW7.5A-DT
3.30

Opponents

Emily AmottCurrently on DIABLO CC CW7.5A-DT
3.28
Cindy RaykiewiczCurrently on CROW CANYON CC CW7.5A-DT
3.34
Rating 3.17 → 3.03Doubles result

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

Best match
+0.16
Sep 22 vs D. Nguyen / J. Lowe
Worst match
−0.09
Oct 1 vs A. Garcia / M. Thomas
Where you started ›3.34
2023 year-end NTRP 3.53.20
Scale calibration+0.14
Season start3.34
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 Nov 4
Year-end re-anchoring
Pulled toward the 2024 year-end level−0.003.34
Pulled toward the 2025 year-end level+0.023.17

More about Heidi

Heidi Corkern has been a USTA NorCal 3.5 since 2021, after starting at 3.0 in 2017. The estimated dynamic rating is 3.33, down 0.01 this season, with a 11–8 record in 2026 across regular and combo play. Most frequent partner: Nancy Daetz, 3–3 in 6 matches together.

Record

11–8
2026 season, 19 matches
5–7
2025 season, 12 matches
4
Longest winning streak
7–4
Matches that went to a third set or match tiebreak

Partners

Best wins

Against the highest-rated opponents by year-end NTRP, this season and last.

Year-end NTRP, 2017–2026

3.0 from 2017 to 2018 and 3.5 from 2021 to 2026.

MatchPoint's estimated dynamic rating is an independent estimate from published USTA NorCal league results through November 4, 2026. It is not a rating USTA calculates, and MatchPoint is not affiliated with USTA.

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