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Wan-In Koo

— year-end
367 matches · 207W–160L · seasons 2019–2026

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Match history367 matches
W
2026-08-17 · Peterson · #2 Doubles · 3.0 · with Susan Way
expectation pending — we’re still fetching an opponent’s record
6-2, 6-4
W
2026-08-16 · Elverhoy · #1 Doubles · 8.0 · with David Carr mixed
doesn’t count toward your NTRP rating
6-4, 2-6, 1-0
L
2026-08-02 · Elverhoy · #3 Doubles · 8.0 · with Eric Elverhoy mixed
doesn’t count toward your NTRP rating
3-6, 7-5, 1-0
W
2026-07-12 · Elverhoy · #2 Doubles · 8.0 · with Eric Elverhoy mixed
doesn’t count toward your NTRP rating
6-4, 6-1
W
2026-07-09 · STLWC/Woodard-Feldman/40&Over4.0W · #1 Singles · 4.0
expectation pending — we’re still fetching an opponent’s record
6-4, 6-2
W
2026-06-28 · Elverhoy · #3 Doubles · 8.0 · with Eric Elverhoy mixed
doesn’t count toward your NTRP rating
6-4, 6-3
L
2026-05-28 · STLWC/Woodard-Feldman/40&Over4.0W · #3 Doubles · 4.0 · with Julie Gordon
expectation pending — we’re still fetching an opponent’s record
7-5, 5-5, 0-1
L
2026-05-03 · Peterson (S) · #2 Doubles · 4.0 · with Amy Johnson
expectation pending — we’re still fetching an opponent’s record
5-7, 2-6
L
2026-05-02 · STL/Woodard/Feldman/55&Over8.0W · #3 Doubles · 8.0 · with Norma Feldman
expectation pending — we’re still fetching an opponent’s record
3-6, 6-4, 0-1
L
2026-04-26 · Peterson (S) · #1 Singles · 4.0
expectation pending — we’re still fetching an opponent’s record
1-6, 5-7
L
2026-04-19 · Peterson (S) · #2 Singles · 4.0
expectation pending — we’re still fetching an opponent’s record
2-6, 2-6
W
2026-04-18 · STL/Woodard/Feldman/55&Over8.0W · #1 Doubles · 8.0 · with Tammy Lanson
expectation pending — we’re still fetching an opponent’s record
6-3, 7-5
Teams67 teams · 2020–2027
Over timerating by season, and how you rank
By level5 levels played
3.0
37.5%
12W–20L · 45.6% of games
3.5
85.5%
59W–10L · 66% of games
4.0
50.2%
119W–118L · 50.9% of games
8.0
50%
4W–4L · 48.7% of games
8.0mixed
61.9%
13W–8L · 55.3% of games

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

By lineusually #1 Singles, 61% of the time
#1 Singles
61%
223 matches
#2 Singles
16%
57 matches
#2 Doubles
13%
48 matches
#3 Doubles
8%
28 matches
#1 Doubles
3%
11 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.

Experience is a big word. I think it comes with time, and I have that.
Serena Williams