MatchPoint

Player profile

Runa Koizumi’s NorCal tennis rating

Runa Koizumi
USTA 3.5 · NorCal league player
3.79
current
▲ +1.00 this season
89% likely to move up

Other formats · don’t affect your rating above

Combo 3.92Mixed 3.71
USTA3.50
2026
61 matches
3.793.493.20
Mar · 3.20
Aug · 3.79
Sep 6 · Doubles+0.09
Match detail is not available. Running 3.92.
● 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

58 matches

Published NorCal results in 2026 — 36 scoring, 22 combo or mixed. Combo and mixed don’t affect NTRP ratings.

Aug 9, 2026 · Doubles

Won 6-2,6-3
+0.06

Runa’s side

Runa KoizumiCurrently on SUNNYVALE TC/SUNNYVALE MTC CW6.5A-DT
3.79
Yangmei Zheng(partner)Currently on RINCONADA PK CW7.5A
3.42

Opponents

Audra LutterCurrently on WALNUT CREEK RC/Walnut Creek TC CW7.5A
3.20
Lang LindsayCurrently on WALNUT CREEK RC/Walnut Creek TC CW7.5A-DT
3.66
Rating 3.70 → 3.76Doubles result

Aug 9, 2026 · Doubles

Won 6-4,6-1
+0.03

Runa’s side

Runa KoizumiCurrently on SUNNYVALE TC/SUNNYVALE MTC CW6.5A-DT
3.79
Hurjane Vongsachang(partner)Currently on RINCONADA PK CW8.5A
3.42

Opponents

Mimi FichterCurrently on SUNNYVALE TC/SUNNYVALE MTC CW6.5A-DT
3.29
Judy HsuCurrently on BAY CLUB SANTA CLARA CW7.5A
3.50
Rating 3.76 → 3.79Doubles result

Aug 7, 2026 · Doubles

Won 6-0,6-2
+0.04

Runa’s side

Runa KoizumiCurrently on SUNNYVALE TC/SUNNYVALE MTC CW6.5A-DT
3.79
Hurjane Vongsachang(partner)Currently on RINCONADA PK CW8.5A
3.42

Opponents

Kim WatsonCurrently on SOUTH RENO TENNIS 55MX8.0A
3.46
Nathalie AtwellCurrently on SOUTH RENO TENNIS CW7.5A
3.45
Rating 3.64 → 3.67Doubles result

Jun 27, 2026 · Doubles

Won 5-7,6-4,1-0
+0.03

Runa’s side

Runa KoizumiCurrently on SUNNYVALE TC/SUNNYVALE MTC CW6.5A-DT
3.79
Yangmei Zheng(partner)Currently on RINCONADA PK CW7.5A
3.42

Opponents

Jenny HarleyCurrently on ALPINE HILLS CW7.5A-DT
3.44
Lauren SaganCurrently on ALPINE HILLS CW7.5A-DT
3.40
Rating 3.61 → 3.64Doubles result

Jun 14, 2026 · Doubles

Won 6-2,6-4
+0.07

Runa’s side

Runa KoizumiCurrently on SUNNYVALE TC/SUNNYVALE MTC CW6.5A-DT
3.79
Yemia Hashimoto(partner)Currently on SUNNYVALE TC/SUNNYVALE MTC CW6.5C
3.60

Opponents

Jennifer ChonCurrently on SAN CARLOS TC/ARGUELLO PK CW6.5C
3.38
Skylar SimpsonCurrently on SAN CARLOS TC/ARGUELLO PK CW6.5C
3.67
Rating 3.54 → 3.61Doubles result

Jun 12, 2026 · Doubles

Won 7-6,6-2
+0.02

Runa’s side

Runa KoizumiCurrently on SUNNYVALE TC/SUNNYVALE MTC CW6.5A-DT
3.79
Ko-yun Chen(partner)Currently on BRAMHALL PK CW7.5A
2.91

Opponents

Sonia WhitfieldCurrently on BAY CLUB COURTSIDE CW7.5A
3.25
Stacie PittengerCurrently on SILVER CREEK CW7.5A
3.30
Rating 3.52 → 3.54Doubles result

Jun 7, 2026 · Doubles

Lost 5-7,5-7
−0.03

Runa’s side

Runa KoizumiCurrently on SUNNYVALE TC/SUNNYVALE MTC CW6.5A-DT
3.79
Lenka Quinanola(partner)Currently on MORGAN HILL TC/MORGAN HILL TC CW8.5A
3.77

Opponents

Emily LingCurrently on SUNNYVALE MTC CW8.5B
4.25
Elizabeth CareyCurrently on MOUNTAIN VIEW TC/RENGSTORFF PK CW7.5A
4.16
Rating 3.50 → 3.47Doubles result

Jun 6, 2026 · Doubles

Lost 1-6,3-6
−0.12

Runa’s side

Runa KoizumiCurrently on SUNNYVALE TC/SUNNYVALE MTC CW6.5A-DT
3.79
Rina Tsujimoto(partner)Currently on SUNNYVALE MTC CW8.5C
3.56

Opponents

Lisa BackusCurrently on SUNNYVALE MTC CW8.5D
4.01
Sally KimCurrently on BAY CLUB COURTSIDE CW7.5B
3.70
Rating 3.53 → 3.40Doubles result

May 31, 2026 · Doubles

Lost 6-2,3-6,0-1
−0.07

Runa’s side

Runa KoizumiCurrently on SUNNYVALE TC/SUNNYVALE MTC CW6.5A-DT
3.79
Lan Wu(partner)Currently on SUNNYVALE TC/SUNNYVALE MTC CW8.5B-DT
3.87

Opponents

Aki CollardCurrently on HIGHLANDS REC CENTER CW8.5A
3.93
Lisa KeslerCurrently on FOSTER CITY TC/EDGEWATER PK CW8.5A
3.90
Rating 3.60 → 3.53Doubles result

May 27, 2026 · Doubles

Won 4-6,6-3,1-0
+0.02

Runa’s side

Runa KoizumiCurrently on SUNNYVALE TC/SUNNYVALE MTC CW6.5A-DT
3.79
Yemia Hashimoto(partner)Currently on SUNNYVALE TC/SUNNYVALE MTC CW6.5C
3.60

Opponents

Debbie AbabaCurrently on SAN CARLOS TC/ARGUELLO PK CW6.5D
3.06
Paige RossCurrently on SAN CARLOS TC/ARGUELLO PK CW7.5A
3.62
Rating 3.66 → 3.69Doubles result

May 26, 2026 · Doubles

Won 6-2,6-1
+0.14

Runa’s side

Runa KoizumiCurrently on SUNNYVALE TC/SUNNYVALE MTC CW6.5A-DT
3.79
Maya Grosul(partner)Currently on SANTA CLARA TC/SANTA CLARA TENNIS C CW7.5A
3.62

Opponents

Michele WangCurrently on UNIVERSITY CLUB PA CW7.5A-DT
3.65
Colleen BackstrandCurrently on UNIVERSITY CLUB PA CW7.5A-DT
3.91
Rating 3.53 → 3.66Doubles result

May 23, 2026 · Doubles

Lost 7-6,1-6,0-1
−0.20

Runa’s side

Runa KoizumiCurrently on SUNNYVALE TC/SUNNYVALE MTC CW6.5A-DT
3.79
Yeping Hu(partner)Currently on SUNNYVALE TC/SUNNYVALE MTC CW6.5C
3.18

Opponents

Nikki ChenCurrently on RINCONADA PK CW7.5A
3.50
Jing ShiCurrently on SUNNYVALE TC/SUNNYVALE MTC CW7.5A-DT
3.41
Rating 3.72 → 3.53Doubles result

May 20, 2026 · Doubles

Won 6-7,6-2,1-0
+0.08

Runa’s side

Runa KoizumiCurrently on SUNNYVALE TC/SUNNYVALE MTC CW6.5A-DT
3.79
Pegah Seddighian(partner)Currently on SANTA CLARA TC/SANTA CLARA TENNIS C CW7.5A
3.73

Opponents

Julie ColwellCurrently on SUNNYVALE TC/SUNNYVALE MTC CW8.5A-DT
3.68
Bridget CashCurrently on SUNNYVALE TC/SUNNYVALE MTC CW8.5A-DT
3.88
Rating 3.64 → 3.72Doubles result

May 18, 2026 · Doubles

Won 6-1,6-1
+0.01

Runa’s side

Runa KoizumiCurrently on SUNNYVALE TC/SUNNYVALE MTC CW6.5A-DT
3.79
Melodie Rubin(partner)Currently on SUNNYVALE TC/SUNNYVALE MTC CW6.5C
3.32

Opponents

Aiko MurakamiCurrently on SUNNYVALE TC/SUNNYVALE MTC CW7.5A-DT
3.40
Elizabeth ShenCurrently on SUNNYVALE TC/SUNNYVALE MTC CW6.5B-DT
2.85
Rating 3.63 → 3.64Doubles result

May 17, 2026 · Doubles

Won 3-6,7-5,1-0
+0.01

Runa’s side

Runa KoizumiCurrently on SUNNYVALE TC/SUNNYVALE MTC CW6.5A-DT
3.79
Meijia Chen(partner)Currently on SUNNYVALE TC/SUNNYVALE MTC CW7.5A-DT
3.34

Opponents

Veronica SanchezCurrently on SANTA CLARA TC/SANTA CLARA TENNIS C CW7.5A
3.17
Terry HuangCurrently on SUNNYVALE MTC CW6.5E
3.33
Rating 3.72 → 3.73Doubles result

May 17, 2026 · Doubles

Lost 3-6,4-6
−0.10

Runa’s side

Runa KoizumiCurrently on SUNNYVALE TC/SUNNYVALE MTC CW6.5A-DT
3.79
Kyung-le Han(partner)Currently on SUNNYVALE MTC CW7.5D-DT
3.56

Opponents

Chenchen ZhangCurrently on SUNNYVALE TC/SUNNYVALE MTC CW8.5B-DT
3.84
Xuezhen FanCurrently on RINCONADA PK CW8.5A
4.05
Rating 3.73 → 3.63Doubles result

May 13, 2026 · Doubles

Won 6-1,7-6
+0.05

Runa’s side

Runa KoizumiCurrently on SUNNYVALE TC/SUNNYVALE MTC CW6.5A-DT
3.79
Rina Tsujimoto(partner)Currently on SUNNYVALE MTC CW8.5C
3.56

Opponents

Dona RayCurrently on PLEASANTON CW7.5B
3.52
Priya KudluCurrently on PLEASANTON CW8.5C
3.59
Rating 3.67 → 3.72Doubles result

May 10, 2026 · Doubles

Won 6-2,6-4
+0.07

Runa’s side

Runa KoizumiCurrently on SUNNYVALE TC/SUNNYVALE MTC CW6.5A-DT
3.79
Puhe Liang(partner)Currently on SUNNYVALE MTC CW7.5B
3.74

Opponents

Katherine SandellCurrently on BAY CLUB SANTA CLARA 40MX7.0A
3.34
Hilary ButlerCurrently on BAY CLUB COURTSIDE CW7.5B-DT
3.79
Rating 3.60 → 3.67Doubles result

May 9, 2026 · Doubles

Won 6-1,6-1
+0.01

Runa’s side

Runa KoizumiCurrently on SUNNYVALE TC/SUNNYVALE MTC CW6.5A-DT
3.79
Yi Zhang(partner)Currently on SUNNYVALE MTC CW8.5E
3.43

Opponents

Deena ElfarCurrently on BAY CLUB COURTSIDE CW7.5C
3.17
Gigi HarveyCurrently on BAY CLUB COURTSIDE CW7.5C
3.07
Rating 3.59 → 3.60Doubles result

May 2, 2026 · Doubles

Won 7-6,2-6,1-0
+0.04

Runa’s side

Runa KoizumiCurrently on SUNNYVALE TC/SUNNYVALE MTC CW6.5A-DT
3.79
Maya Grosul(partner)Currently on SANTA CLARA TC/SANTA CLARA TENNIS C CW7.5A
3.62

Opponents

Jane DongCurrently on SUNNYVALE MTC CW7.5B
3.39
Vy Nguyen
3.55
Rating 3.51 → 3.55Doubles result

Apr 29, 2026 · Doubles

Won 6-4,6-2
+0.05

Runa’s side

Runa KoizumiCurrently on SUNNYVALE TC/SUNNYVALE MTC CW6.5A-DT
3.79
Xin Yang(partner)Currently on SUNNYVALE MTC CW6.5E
3.15

Opponents

Ashley ChangCurrently on FOSTER CITY TC/EDGEWATER PK CW7.5A
3.76
Xiaodan KangCurrently on SUNNYVALE MTC CW6.5D
3.12
Rating 3.46 → 3.51Doubles result

Apr 26, 2026 · Doubles

Won 5-7,6-4,1-0
+0.01

Runa’s side

Runa KoizumiCurrently on SUNNYVALE TC/SUNNYVALE MTC CW6.5A-DT
3.79
Elizabeth Brackenbury(partner)Currently on UNIVERSITY CLUB PA CW7.5A-DT
3.02

Opponents

Lingqin YangCurrently on SUNNYVALE MTC CW6.5B
2.98
Xingfan JiaCurrently on SUNNYVALE MTC CW6.5B
3.37
Rating 3.46 → 3.46Doubles result

Apr 22, 2026 · Doubles

Won 6-3,6-4
+0.01

Runa’s side

Runa KoizumiCurrently on SUNNYVALE TC/SUNNYVALE MTC CW6.5A-DT
3.79
Phuong Nguyen(partner)Currently on SAN CARLOS TC/ARGUELLO PK CW6.5E
3.32

Opponents

Colleen McculloughCurrently on SUNNYVALE MTC CW6.5A
3.05
Michelle NeyCurrently on SUNNYVALE MTC CW6.5A
3.02
Rating 3.38 → 3.38Doubles result

Apr 19, 2026 · Doubles

Won 6-3,6-3
+0.07

Runa’s side

Runa KoizumiCurrently on SUNNYVALE TC/SUNNYVALE MTC CW6.5A-DT
3.79
Wei Zheng(partner)Currently on SUNNYVALE MTC CW6.5D
3.37

Opponents

Meijia ChenCurrently on SUNNYVALE TC/SUNNYVALE MTC CW7.5A-DT
3.34
Jieying ShiCurrently on SUNNYVALE TC/SUNNYVALE MTC CW7.5A-DT
3.60
Rating 3.36 → 3.43Doubles result

Apr 19, 2026 · Doubles

Lost 5-7,6-3,0-1
−0.06

Runa’s side

Runa KoizumiCurrently on SUNNYVALE TC/SUNNYVALE MTC CW6.5A-DT
3.79
Lan Wu(partner)Currently on SUNNYVALE TC/SUNNYVALE MTC CW8.5B-DT
3.87

Opponents

Ameeta MukherjeeCurrently on SUNNYVALE MTC CW8.5B
3.89
Babette Van AntwerpenCurrently on SUNNYVALE TC/SUNNYVALE MTC CW8.5A
4.05
Rating 3.43 → 3.38Doubles result

Apr 18, 2026 · Doubles

Won 1-6,7-6,1-0
+0.05

Runa’s side

Runa KoizumiCurrently on SUNNYVALE TC/SUNNYVALE MTC CW6.5A-DT
3.79
Lan Wu(partner)Currently on SUNNYVALE TC/SUNNYVALE MTC CW8.5B-DT
3.87

Opponents

Yue XuCurrently on SUNNYVALE MTC CW6.5D
3.73
Yangmei ZhengCurrently on RINCONADA PK CW7.5A
3.42
Rating 3.31 → 3.36Doubles result

Apr 17, 2026 · Doubles

Lost 3-6,2-6
−0.08

Runa’s side

Runa KoizumiCurrently on SUNNYVALE TC/SUNNYVALE MTC CW6.5A-DT
3.79
Masami Matsuura(partner)Currently on SUNNYVALE MTC CW7.5D-DT
3.70

Opponents

Arianna ChoingCurrently on BAY TREES PK CW7.5A
4.08
Christy MaCurrently on UNIVERSITY CLUB PA 40MX9.0A
3.98
Rating 3.39 → 3.31Doubles result

Mar 28, 2026 · Doubles · Mixed

Lost 1-6,3-6
−0.01

Runa’s side

Runa KoizumiCurrently on SUNNYVALE TC/SUNNYVALE MTC CW6.5A-DT
3.71
David Le(partner)Currently on LOS PASEOS PK CM8.5A
4.09

Opponents

Keri SmithCurrently on SUNNYVALE MTC 40MX8.0C
4.61
Kehan LiCurrently on SUNNYVALE MTC CM9.5A
4.48
Mixed rating 3.88 → 3.88Doubles result

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

Mar 28, 2026 · Doubles · Mixed

Lost 3-6,3-6
−0.17

Runa’s side

Runa KoizumiCurrently on SUNNYVALE TC/SUNNYVALE MTC CW6.5A-DT
3.71
Shengchen Liu(partner)
2.96

Opponents

Junpeng YaoCurrently on SUNNYVALE MTC CM7.5E
3.94
Jia HeCurrently on CUESTA TC CW5.5A
2.96
Mixed rating 3.88 → 3.71Doubles result

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

Mar 22, 2026 · Doubles

Won 6-4,6-1
+0.06

Runa’s side

Runa KoizumiCurrently on SUNNYVALE TC/SUNNYVALE MTC CW6.5A-DT
3.79
Yue Xu(partner)Currently on SUNNYVALE MTC CW6.5D
3.73

Opponents

Colleen SonnebornCurrently on NOVATO TC/PIONEER PK 40MX8.0A
3.49
Nina KimCurrently on TENNIS COALITION SF/GOLDMAN TC CW7.5A-DT
3.35
Rating 3.33 → 3.39Doubles result

Mar 20, 2026 · Doubles

Won 6-0,3-6,1-0
+0.07

Runa’s side

Runa KoizumiCurrently on SUNNYVALE TC/SUNNYVALE MTC CW6.5A-DT
3.79
Nikki Chen(partner)Currently on RINCONADA PK CW7.5A
3.50

Opponents

Sara CrateCurrently on TIBURON PEN C CW6.5A
3.41
Ilana RothCurrently on MT TAM RC CW7.5A
3.59
Rating 3.20 → 3.27Doubles result

Mar 20, 2026 · Doubles

Won 6-3,6-1
+0.06

Runa’s side

Runa KoizumiCurrently on SUNNYVALE TC/SUNNYVALE MTC CW6.5A-DT
3.79
Yue Xu(partner)Currently on SUNNYVALE MTC CW6.5D
3.73

Opponents

Claiborne BrownCurrently on SUNNYVALE TC/SUNNYVALE MTC CW7.5A
3.47
Jennifer WalkerCurrently on UNIVERSITY CLUB PA CW7.5A-DT
3.39
Rating 3.27 → 3.33Doubles result

Mar 14, 2026 · Doubles · Mixed

Won 4-6,6-1,1-0
+0.16

Runa’s side

Runa KoizumiCurrently on SUNNYVALE TC/SUNNYVALE MTC CW6.5A-DT
3.71
Shu Fan Du(partner)Currently on FOSTER CITY TC/EDGEWATER PK CM8.5B
3.97

Opponents

Mark DinhCurrently on RINCONADA PK 40MX8.0B
4.29
Yingfei WuCurrently on SAN CARLOS TC/ARGUELLO PK CW6.5B
3.56
Mixed rating 3.72 → 3.88Doubles result

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

Mar 13, 2026 · Doubles · Mixed

Lost 6-7,7-6,0-1
−0.10

Runa’s side

Runa KoizumiCurrently on SUNNYVALE TC/SUNNYVALE MTC CW6.5A-DT
3.71
Jo Zhang(partner)Currently on RINCONADA PK CM7.5A
3.34

Opponents

Daniel HoulbrookCurrently on SUNNYVALE TC/SUNNYVALE MTC CM6.5D
3.39
Sue Lin HoltCurrently on SUNNYVALE TC/SUNNYVALE MTC CW6.5B-DT
2.97
Mixed rating 3.83 → 3.72Doubles result

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

Mar 8, 2026 · Doubles · Mixed

Lost 1-6,6-3,0-1
−0.11

Runa’s side

Runa KoizumiCurrently on SUNNYVALE TC/SUNNYVALE MTC CW6.5A-DT
3.71
Zhouyang Li(partner)Currently on BRAMHALL PK CM7.5B
3.24

Opponents

David LaoCurrently on RINCONADA PK CM9.5B
4.28
Xiwen ZhaoCurrently on BRAMHALL PK CW6.5A
3.28
Mixed rating 3.89 → 3.78Doubles result

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

Mar 8, 2026 · Doubles · Mixed

Won 6-1,6-1
+0.05

Runa’s side

Runa KoizumiCurrently on SUNNYVALE TC/SUNNYVALE MTC CW6.5A-DT
3.71
Shengchen Liu(partner)
2.96

Opponents

Lucas LuoCurrently on SUNNYVALE MTC CM6.5F
3.10
Jin Zhang
3.32
Mixed rating 3.78 → 3.83Doubles result

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

Mar 7, 2026 · Doubles · Mixed

Won 6-1,6-1
+0.07

Runa’s side

Runa KoizumiCurrently on SUNNYVALE TC/SUNNYVALE MTC CW6.5A-DT
3.71
Shi Dong(partner)Currently on SUNNYVALE MTC CM7.5D
3.82

Opponents

Avinash ViswanathanCurrently on WALLENBERG PK CM7.5A
3.72
Cynthia JamesCurrently on FREMONT TC CW7.5A
3.11
Mixed rating 3.82 → 3.89Doubles result

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

Mar 1, 2026 · Doubles · Mixed

Lost 6-7,6-7
−0.12

Runa’s side

Runa KoizumiCurrently on SUNNYVALE TC/SUNNYVALE MTC CW6.5A-DT
3.71
Rohan Shrotriya(partner)Currently on SANTA CLARA TC/SANTA CLARA TENNIS C CM7.5A
3.14

Opponents

Henry LuCurrently on RINCONADA PK CM7.5B
3.48
Baozhang RenCurrently on SUNNYVALE MTC CW7.5B
3.90
Mixed rating 3.94 → 3.82Doubles result

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

Feb 28, 2026 · Doubles · Mixed

Lost 4-6,1-6
−0.19

Runa’s side

Runa KoizumiCurrently on SUNNYVALE TC/SUNNYVALE MTC CW6.5A-DT
3.71
Shengchen Liu(partner)
2.96

Opponents

Ryan Lau
3.91
Yuchen ZhangCurrently on SANTA CLARA TC/SANTA CLARA TENNIS C CW5.5A
3.39
Mixed rating 4.13 → 3.94Doubles result

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

Feb 26, 2026 · Doubles · Mixed

Won 6-1,6-2
+0.08

Runa’s side

Runa KoizumiCurrently on SUNNYVALE TC/SUNNYVALE MTC CW6.5A-DT
3.71
Shi Dong(partner)Currently on SUNNYVALE MTC CM7.5D
3.82

Opponents

Yi Cui
3.03
Wei JingCurrently on SUNNYVALE MTC 40MX8.0A
3.89
Mixed rating 4.05 → 4.13Doubles result

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

Feb 25, 2026 · Doubles · Mixed

Won 6-2,6-3
+0.02

Runa’s side

Runa KoizumiCurrently on SUNNYVALE TC/SUNNYVALE MTC CW6.5A-DT
3.71
Eric Chu(partner)Currently on SANTA CLARA TC/SANTA CLARA TENNIS C CM7.5A
3.49

Opponents

Amanda HolmquistCurrently on SAN JOSE SR CW7.5A
3.08
Basim NooriCurrently on SUNNYVALE TC/SUNNYVALE MTC CM6.5G
3.02
Mixed rating 4.03 → 4.05Doubles result

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

Feb 23, 2026 · Doubles · Mixed

Won 6-3,6-4
+0.12

Runa’s side

Runa KoizumiCurrently on SUNNYVALE TC/SUNNYVALE MTC CW6.5A-DT
3.71
Yubo Ouyang(partner)Currently on SUNNYVALE MTC CM7.5E
3.58

Opponents

Qiang Hu
3.38
Christy MaCurrently on UNIVERSITY CLUB PA 40MX9.0A
4.01
Mixed rating 3.91 → 4.03Doubles result

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

Feb 14, 2026 · Doubles · Mixed

Won 2-6,7-5,1-0
+0.10

Runa’s side

Runa KoizumiCurrently on SUNNYVALE TC/SUNNYVALE MTC CW6.5A-DT
3.71
Shi Dong(partner)Currently on SUNNYVALE MTC CM7.5D
3.82

Opponents

Shang LiuCurrently on SUNNYVALE MTC 40MX8.0A
3.97
Jing ZhaoCurrently on SUNNYVALE MTC CW6.5B
3.28
Mixed rating 3.80 → 3.91Doubles result

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

Feb 9, 2026 · Doubles · Mixed

Lost 6-7,1-6
−0.05

Runa’s side

Runa KoizumiCurrently on SUNNYVALE TC/SUNNYVALE MTC CW6.5A-DT
3.71
Surik Torosyan(partner)Currently on SUNNYVALE MTC CM9.5C
4.29

Opponents

Hurjane VongsachangCurrently on RINCONADA PK CW8.5A
4.09
Kehan LiCurrently on SUNNYVALE MTC CM9.5A
4.48
Mixed rating 3.85 → 3.80Doubles result

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

Feb 8, 2026 · Doubles · Mixed

Won 6-4,6-1
+0.18

Runa’s side

Runa KoizumiCurrently on SUNNYVALE TC/SUNNYVALE MTC CW6.5A-DT
3.71
Donny Su(partner)Currently on SUNNYVALE MTC 40MX8.0C
4.53

Opponents

Juan CastilloCurrently on SUNNYVALE TC/SUNNYVALE MTC CM8.5F
4.11
Zixiao ChengCurrently on SUNNYVALE MTC CW7.5B
3.64
Mixed rating 3.67 → 3.85Doubles result

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

Feb 3, 2026 · Doubles · Mixed

Won 6-2,6-2
+0.01

Runa’s side

Runa KoizumiCurrently on SUNNYVALE TC/SUNNYVALE MTC CW6.5A-DT
3.71
Edison Huang(partner)
3.37

Opponents

Bob WhitakerCurrently on SAN CARLOS TC/ARGUELLO PK 55MX7.0A
3.23
Kirsten CunninghamCurrently on BAY CLUB COURTSIDE CW7.5C
2.99
Mixed rating 3.66 → 3.67Doubles result

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

Jan 31, 2026 · Doubles · Mixed

Won 6-4,7-5
+0.15

Runa’s side

Runa KoizumiCurrently on SUNNYVALE TC/SUNNYVALE MTC CW6.5A-DT
3.71
Shi Dong(partner)Currently on SUNNYVALE MTC CM7.5D
3.82

Opponents

Dan GullionCurrently on WALNUT CREEK RC/Walnut Creek TC CM8.5B
4.07
Yang YangCurrently on SUNNYVALE MTC CW6.5B
3.50
Mixed rating 3.51 → 3.66Doubles result

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

Jan 30, 2026 · Doubles · Mixed

Won 4-6,7-6,1-0
+0.04

Runa’s side

Runa KoizumiCurrently on SUNNYVALE TC/SUNNYVALE MTC CW6.5A-DT
3.71
Jeremy Qiao Chen(partner)Currently on UNIVERSITY CLUB PA 40MX7.0A
3.59

Opponents

Drew ZoghbyCurrently on SUNNYVALE TC/SUNNYVALE MTC CM6.5D
3.18
Annarose Pamatmat
3.35
Mixed rating 3.54 → 3.58Doubles result

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

Jan 30, 2026 · Doubles · Mixed

Lost 1-6,6-4,0-1
−0.07

Runa’s side

Runa KoizumiCurrently on SUNNYVALE TC/SUNNYVALE MTC CW6.5A-DT
3.71
Rohan Shrotriya(partner)Currently on SANTA CLARA TC/SANTA CLARA TENNIS C CM7.5A
3.14

Opponents

Qing FengCurrently on SUNNYVALE MTC 40MX7.0F
3.82
Haewon KwonCurrently on SANTA CLARA TC/SANTA CLARA TENNIS C CW6.5A-DT
4.11
Mixed rating 3.58 → 3.51Doubles result

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

Jan 24, 2026 · Doubles · Combo

Won 6-0,6-1
+0.01

Runa’s side

Runa KoizumiCurrently on SUNNYVALE TC/SUNNYVALE MTC CW6.5A-DT
3.92
Yeping Hu(partner)Currently on SUNNYVALE TC/SUNNYVALE MTC CW6.5C
3.50

Opponents

Catherine GougeCurrently on OLYMPIC CW7.5A
3.36
Amanda MartialCurrently on OLYMPIC CW6.5A
3.14
Combo rating 3.79 → 3.80Doubles result

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

Jan 20, 2026 · Doubles · Mixed

Won 7-5,7-6
+0.23

Runa’s side

Runa KoizumiCurrently on SUNNYVALE TC/SUNNYVALE MTC CW6.5A-DT
3.71
David Lao(partner)Currently on RINCONADA PK CM9.5B
4.28

Opponents

Andrew HuangCurrently on SUNNYVALE MTC 40MX7.0F
4.21
Maggie YuenCurrently on SUNNYVALE MTC CW8.5D
4.21
Mixed rating 3.32 → 3.54Doubles result

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

Jan 17, 2026 · Doubles · Mixed

Lost 5-7,0-6
−0.02

Runa’s side

Runa KoizumiCurrently on SUNNYVALE TC/SUNNYVALE MTC CW6.5A-DT
3.71
Stephen Lee(partner)Currently on SUNNYVALE TC/SUNNYVALE MTC CM8.5F
4.18

Opponents

Yukari SaitoCurrently on SUNNYVALE MTC 40MX8.0C
4.53
Yuta TaguchiCurrently on PINEWOOD PK CM8.5A
4.06
Mixed rating 3.33 → 3.32Doubles result

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

Best match
+0.14
May 26 vs M. Wang / C. Backstrand
Worst match
−0.20
May 23 vs N. Chen / J. Shi
▲
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

Runa Koizumi’s MatchPoint NorCal tennis rating is 3.79, an independent estimate based on published NorCal league results through September 20, 2026. They are currently rostered on 9 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−0.342.45
Pulled toward the 2025 year-end level−0.183.20

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