Teams

OC Tennis Lovers - Diekneit - Sat11

2026 USTA Mixed Doubles 40 & Over - OC · OC - 7.0 WE - Weekend Mixed Doubles

12 players · average NTRP 3.60 / SO.CALIFORNIA

No matches recorded for this roster in this league — it may be a placeholder registration, or the season may not have started.

View scouting list →
Schedule13 played
2026-08-22vs OC LNRC - Dennis - Sun1030Lost 12
L#1 DoublesSharon Diekneit / Ray Ng vs Doug Frazier / Maureen Dominguez6-4, 1-6, 0-1
L#2 DoublesSophia Yim / Bill Yim vs Lijuan Huang / Siddhartha Khanna4-6, 3-6
W#3 DoublesJohn Simmons / Tammy Simmons vs Christine Andriola / Kaveh Shahbaz7-5, 4-6, 1-0
2026-08-08vs OC Fullerton TC - Joel - Sun11Lost 03
L#1 DoublesSophia Yim / Bill Yim vs Angela Leung / Alin Curtean0-6, 3-6
L#2 DoublesTammy Simmons / John Simmons vs Cassidee Nguyen / Joel Pereda2-6, 1-6
L#3 DoublesCarrie Ren / Ben Seifollahi vs Jill Jobran / Jimmy Nguyen3-6, 2-6
2026-08-02vs OC CMTC - Leonard - Sun11Won 20
W#1 DoublesCarrie Ren / John Donati vs Jenny Zheng / Michael Hao Chen6-4, 6-2
W#3 DoublesTammy Simmons / John Simmons vs Julie Male / David Zhou6-1, 6-2
2026-07-25vs OC MetaServe LPC - Debra - Sat3Lost 02
L#1 DoublesSophia Yim / Bill Yim vs Chunyan Chen / Yongyong Liang1-6, 1-6
L#3 DoublesCarrie Ren / Ben Seifollahi vs Selina Mansonhing / Jon Wang2-6, 3-6
2026-07-12vs OC Marbella CC - Sarah - Sun1/3Won 21
W#1 DoublesSophia Yim / Bill Yim vs Kathryn Frost / Albert Salazar6-2, 6-1
W#2 DoublesCarrie Ren / John Donati vs Chrissy Nordheim / D Mark Nordheim6-2, 6-1
L#3 DoublesTammy Simmons / John Simmons vs Sarah Hallenbeck / Jack Rollins4-6, 4-6
2026-06-28vs OC LPC - Joo*/Tang - Sun3Lost 03
L#1 DoublesCarrie Ren / John Donati vs Cindy Tang / ABDUL KAREEM2-6, 3-6
L#2 DoublesTammy Simmons / John Simmons vs Hong An Huynh / Young Joo2-6, 2-6
L#3 DoublesSharon Diekneit / Ben Seifollahi vs Hatien Nguyen / Ethan Huynh5-7, 4-6
2026-06-20vs OC LPC Meta Friends - Troy - Sun3Lost 03
L#1 DoublesCarrie Ren / John Donati vs Shirley Xu / Agee Barooni6-3, 2-6, 1-0
L#2 DoublesSophia Yim / Bill Yim vs Tricia Bregman / Li Xu2-6, 0-6
L#3 DoublesSharon Diekneit / Ray Ng vs MEGAN VILLANUEVA / Dawei Wang6-3, 5-6, 0-1
2026-06-06vs OC CMTC - Yannick - Sun1Won 30
W#1 DoublesCarrie Ren / John Donati vs Cindy Zhang / Hany Erian6-4, 6-2
W#2 DoublesSharon Diekneit / Ben Seifollahi vs Robin Briones / Qian Xie5-7, 5-4, 1-0
W#3 DoublesTammy Simmons / John Simmons vs Susan Fong / Edmond Cheung7-6, 6-7, 1-0
2026-05-31vs OC LPC - NishaLost 12
W#1 DoublesSophia Yim / Bill Yim vs Nancy Marcosa / David Mak6-4, 6-3
L#2 DoublesCarrie Ren / John Donati vs Nicole Miranda / Ron Borje7-6, 4-6, 1-0
L#3 DoublesKim Quaglierini / Ben Seifollahi vs Kristi Wechsler / David Jernigan6-4, 0-6, 0-1
W#1 DoublesSophia Yim / Bill Yim vs Katherine Mcdowell / Mike White7-6, 6-3
W#2 DoublesTammy Simmons / John Simmons vs Debra Gilson / Brian Lee6-4, 6-3
L#3 DoublesSharon Diekneit / Ray Ng vs Lisabeth Grimm / Marlon Gavino Villa4-6, 6-7
2026-05-16vs OC NBTC Smart Aces- Brian - Sat11Won 21
W#1 DoublesCarrie Ren / John Donati vs Jennifer Whitehead / John Shook6-3, 6-3
W#2 DoublesTammy Simmons / John Simmons vs Christina Pataky / Michael Serero3-6, 6-4, 1-0
L#3 DoublesSharon Diekneit / Ben Seifollahi vs Leigh Donaldson Carman / Gruyer Cadacio3-6, 7-5, 1-0
2026-05-03vs OC Heritage park - Leslie - Sun3Lost 12
L#1 DoublesSophia Yim / Bill Yim vs Khanh Vu / Javier Leon4-6, 5-7
L#2 DoublesVeronica Johns-Richardson / Ramon Dawson vs Trang Phan / Marcus Mercurio2-6, 1-6
W#3 DoublesSharon Diekneit / Ben Seifollahi vs Julie Mak / Benjamin Nguyen6-4, 2-6, 1-0
2026-04-25vs OC YLCC - Sheri 1pmLost 12
L#1 DoublesCarrie Ren / John Donati vs Emily Lee / Vikram Anerao4-6, 3-6
W#2 DoublesRay Ng / Sharon Diekneit vs Allen Whitten / Jennifer Nieto7-6, 6-3
L#3 DoublesTammy Simmons / John Simmons vs Charles Breeden / Kristine Levenson6-4, 3-6, 0-1
A tie can be incomplete. Tell us if someone is missing.
i
Grouped by tie — one fixture, several lines. A line shows only when a player on it is someone we have indexed, so an early-season tie for a newly-added team can look short. This also means the line count here will not match the header, which counts individual player appearances.
Flight standings12 teams · OC - 7.0 WE - Weekend Mixed Doubles
TeamWLInd. WInd. LSets lostGames lost
1OC MetaServe LPC - Debra - Sat312135411239
2OC Fullerton TC - Joel - Sun1111133310212
3OC LPC - Joo*/Tang - Sun3102251127256
4OC CMTC - Yannick - Sun194241534294
5OC YLCC - Sheri 1pm66171945359
6OC Heritage park - Leslie - Sun367192048368
7OC Tennis Lovers - Diekneit - Sat1157152147360
8OC Dark Horses - Fullerton - Robert Sun1158152455403
9OC LPC Meta Friends - Troy - Sun349172251377
10OC CMTC - Leonard - Sun1149112859383
11OC Marbella CC - Sarah - Sun1/3210102655387
12OC NBTC Smart Aces- Brian - Sat11211102963424

Ordered by team wins, then losses, then sets lost — the order USTA uses to seed a flight. Individual wins are lines, not ties.

See the full flight, with every team’s record

ScoutingWhere each opponent usually plays

Signed-in extra: whether this captain plays strict strength order or mixes it up, from every doubles line they have put out. Create a free account to see it.

Roster averages 3.34 estimated across 8 rated players. No lineup is published in advance, so the column below is where each player has actually been used — a captain's habits are the best available forecast. Sign in and claim your record to see who you have played.

3.77
Bill Yim
usually #1 Doubles 75%, also #2 Doubles 25% · published 4
3.64
Jeffery Kam
usually #2 Doubles 75%, also #1 Doubles 25% · published 3.5
3.39
Tammy Simmons
usually #3 Doubles 56%, also #2 Doubles 44% · published
3.29
Sharon Diekneit
usually #3 Doubles 50%, also #2 Doubles 40% · published 3.5
3.28
Ben Seifollahi
usually #3 Doubles 86%, also #2 Doubles 14% · published 3.5
3.18
Kim Quaglierini
usually #3 Doubles 100% · published
3.10
Carrie Ren
usually #1 Doubles 60%, also #3 Doubles 20% · published 3.5
3.04
Veronica Johns-Richardson
usually #2 Doubles 100% · published
John Donati
usually #1 Doubles 75%, also #2 Doubles 25% · published
Ramon Dawson
usually #2 Doubles 100% · published
Ray Ng
usually #3 Doubles 50%, also #1 Doubles 25% · published
Sophia Yim
usually #1 Doubles 75%, also #2 Doubles 25% · published
Established pairs

Doubles pairs from this roster with three or more matches together anywhere — ordered by performance against what the rating gap predicted, not by record.

Sophia Yim + Bill Yim4546% gamesnot enough data
Sharon Diekneit + Ray Ng3553% gamesnot enough data
Sharon Diekneit + Ben Seifollahi4447% gamesnot enough data
John Donati + Carrie Ren4455% gamesnot enough data
Sharon Diekneit + Jeffery Kam4354% gamesnot enough data
Roster

Ordered by our estimated dynamic rating, which is why two players at the same published level are not tied — a published 4.0 says nothing about where inside the band someone sits. Lines played in this team’s season are shown beside each name.

4
Bill Yim
4W–5L career · type S · 8 lines in 2026
3%92%5%
3.77
3.5
Jeffery Kam
148W–117L career · type A · 4 lines in 2026
<1%16%84%
3.64
Tammy Simmons
11W–6L career · 9 lines in 2026
<1%77%22%
3.39
3.5
Sharon Diekneit
185W–204L career · 10 lines in 2026
2%92%6%
3.29
3.5
Ben Seifollahi
5W–7L career · 7 lines in 2026
2%92%6%
3.28
Kim Quaglierini
11W–10L career · 1 line in 2026
10%89%1%
3.18
3.5
Carrie Ren
10W–12L career · type S · 10 lines in 2026
24%75%<1%
3.10
Veronica Johns-Richardson
10W–6L career · 1 line in 2026
<1%39%61%
3.04
John Donati
5W–9L career · 8 lines in 2026
not enough data
Ramon Dawson
0W–2L career · 1 line in 2026
not enough data
Ray Ng
6W–8L career · 4 lines in 2026
not enough data
Sophia Yim
4W–5L career · 8 lines in 2026
not enough data

Three percentages are where each player stands right now: the chance they are below their band, inside it, or above it, on the way they are playing this season. The number on the right is our estimated dynamic rating, which USTA never publishes. This is today rather than a forecast of December, because a forecast has to assume future matches and cannot know whether someone will even be offered them. Percentages are blank where a player has too few matches this season, or at a level where the model does not yet beat a base-rate guess; the estimate is a weaker claim than a probability and survives where those do not.

Not affiliated with or endorsed by the USTA. Ratings labelled as published are USTA year-end figures; anything we describe as an estimate is ours, not USTA’s. Match data is from USTA TennisLink.