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Sean Koo

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LEWISVILLE, TX
3.5C year-end 2025
i
Computer — generated by the USTA algorithm from match play
149 matches · 72W–77L · seasons 2018–2025
Match history149 matches
L
2025-03-14 · Jones/Shemyakin over winter · #2 Doubles · 8.0 · with Alyssa Vanderschaaf mixed
doesn’t count toward your NTRP rating
3-6, 5-7
L
2025-03-13 · Fermstad: Top 40 · #1 Doubles · 4.0 · with Jim Terhaar
loading the estimate
2-6, 4-6
L
2025-02-20 · Fermstad: Top 40 · #1 Singles · 4.0
loading the estimate
1-6, 0-6
L
2025-02-14 · Jones/Shemyakin over winter · #1 Doubles · 8.0 · with Cayla Cordova mixed
doesn’t count toward your NTRP rating
5-7, 2-6
L
2025-02-13 · Fermstad: Top 40 · #1 Singles · 4.0
loading the estimate
2-6, 1-6
L
2025-02-06 · Fermstad: Top 40 · #1 Singles · 4.0
loading the estimate
2-6, 1-6
L
2025-01-31 · Jones/Shemyakin over winter · #3 Doubles · 8.0 · with Deanie Hatch mixed
doesn’t count toward your NTRP rating
2-6, 3-6
L
2025-01-17 · Jones/Shemyakin over winter · #3 Doubles · 8.0 · with Liz Jones mixed
doesn’t count toward your NTRP rating
1-6, 4-6
L
2024-12-13 · Jones/Shemyakin · #1 Doubles · 8.0 · with Liz Jones mixed
doesn’t count toward your NTRP rating
3-6, 0-6
L
2024-12-05 · Fermstad: Top 40 · #1 Singles · 4.0
loading the estimate
1-6, 0-6
L
2024-11-21 · Fermstad: Top 40 · #2 Doubles · 4.0 · with Jim Terhaar
loading the estimate
2-6, 4-6
L
2024-11-14 · Fermstad: Top 40 · #1 Doubles · 4.0 · with Jason Ross
loading the estimate
3-6, 2-6
Where you rank locallyagainst everyone at your level
Teams40 teams · 2019–2025
Fermstad: Top 40
2025 ADULT 40 & OVER EARLY START · 4.0 MEN · 40+
2025
Fermstad: Top 40
2025 Adult 40 & Over Winter · 4.0 Men · 40+
2025
Jones/Shemyakin
2025 MIXED 18 & OVER EARLY START · 8.0 MX (FRI) · 18+
2025
Jones/Shemyakin over winter
2025 Mixed 18 & Over Winter · 8.0 MX (FRI) · 18+
2025
Over Served - Trettel
2024 MIXED 18 & OVER EARLY START · 7.0 MX (FRI) · 18+
2024
Trettel - Sum24
2024 Mixed 40 & OVER Summer · 7.0 MIXED · 40+
2024
Trettel - W24
2024 Mixed 18 & Over Winter · 7.0 MX (FRI) · 18+
2024
Fermstad- LakeVillains 18+ W23
2023 Adult 18 & Over Winter · 4.0 Men · 18+
2023
Fermstad- Top 40 W23
2023 Adult 40 & Over Winter · 4.0 Men · 40+
2023
Fermstad: 4.0 LakeVillains 18+ ES23
2023 ADULT 18 & OVER EARLY START · 4.0 MEN · 18+
2023
Fjelstad/Trevino 7.0 18+MX W23
2023 Mixed 18 & Over Winter · 7.0 Mx · 18+
2023
Fjelstad/Trevino 7.0 ES23
2023 MIXED 18 & OVER EARLY START · 7.0 MX · 18+
2023
Sean/Shannon
2023 ONE Mixed Doubles SPRING · 8.0 Mixed
2023
Fermstad- Winter Top 40
2022 Adult 40 & Over Winter · 4.0 Men · 40+
2022
Goodwin Love at first serve
2022 MIXED 18 & OVER EARLY START · 7.0 MX · 18+
2022
Kyriagis - Crosstown Traffic
2022 ADULT 18 & OVER EARLY START · 4.0 MEN · 18+
2022
McIntyre- Fronthand Backhand
2022 Adult 18 & Over Winter · 4.0 Men · 18+
2022
Koo/Epshteyn
2021 Fall Mixed ONE Doubles · 8.0 Mixed
2021
Ewen8.0FALL
2020 MIXED 18 & OVER EARLY START · 8.0 MX · 18+
2020
Ewen8.0Winter
2020 Mixed 18 & Over Winter · 8.0 Mx · 18+
2020
Kerwin-Baill
2020 Adult 40 & Over Winter · 4.0 Men · 40+
2020
Kyriagis/Waslif - Crosstown Traffic
2020 Adult 18 & Over Winter · 4.0 Men · 18+
2020
Kyriagis/Waslif - Crosstown Traffic
2020 ADULT 18 & OVER EARLY START · 4.0 MEN · 18+
2020
Burke DeSanto mixed early 2019
2019 MIXED 18 & OVER EARLY START · 8.0 MX · 18+
2019
Burke Desanto 2019 winter mixed
2019 Mixed 18 & Over Winter · 8.0 Mx · 18+
2019
Carlson
2019 MIXED 18 & OVER EARLY START · 7.0 MX · 18+
2019
Ewen8.0Summer
2019 MIXED 18 & OVER SUMMER · 8.0 MIXED · 18+
2019
Hassenstab - 20 Grand Slams
2019 ADULT 40 & OVER SUMMER · 3.5 Men · 40+
2019
Hassenstab - 20 Grand Slams
2019 ADULT 40 & OVER EARLY START · 3.5 MEN · 40+
2019
Hassenstab - 20 Grand Slams
2019 Adult 40 & Over Winter · 3.5 Men · 40+
2019
Koo- 2S/HK
2019 ONE Doubles MIXED Fall · 7.0 Mixed
2019
Kyriagis
2019 ADULT 18 & OVER EARLY START · 4.0 MEN · 18+
2019
Kyriagis - Benelli
2019 Adult 18 & Over Winter · 4.0 Men · 18+
2019
Kyriagis / Benelli
2019 ADULT 18 & OVER SUMMER · 4.0 Men · 18+
2019
Northern/Ewen/Mixed40&Over7.0
2019 Mixed 40 & OVER Winter · 7.0 MIXED · 40+
2019
Shaughnessy / Bayne
2019 ADULT 18 & OVER EARLY START · 3.5 MEN · 18+
2019
Shaughnessy Ball Smashers
2019 Adult 18 & Over Winter · 3.5 Men · 18+
2019
Shaughnessy Ball Smashers
2019 ADULT 18 & OVER SUMMER · 3.5 Men · 18+
2019
Spalding/Koo
2019 ONE Doubles MIXED Spring · 8.0 Mixed
2019
Toleu- Mixed and Matched
2019 Mixed 18 & Over Winter · 7.0 Mx · 18+
2019
Over timerating by season, and how you rank
By level4 levels played
3.5
82.8%
24W–5L · 60.6% of games
4.0
32.3%
21W–44L · 42.6% of games
7.0mixed
60.7%
17W–11L · 57% of games
8.0mixed
37%
10W–17L · 45% of games

Games won matters more than matches won — NTRP adjusts on margins.

By lineusually #2 Doubles, 32% of the time
#2 Doubles
32%
47 matches
#1 Doubles
29%
43 matches
#3 Doubles
22%
33 matches
#1 Singles
15%
22 matches
#2 Singles
3%
4 matches

How often, across every team and every match we hold — including ones that do not count toward a rating. Advanced stats has a court-position table too, and it answers a different question: how well you do there, over matches that count. A team’s own page shows how that one team uses you.

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.

The mark of great sportsmen is not how good they are at their best, but how good they are at their worst.
Martina Navratilova