← Search

Wan-In Koo

Add to scout listFree account. Monday email when they play.
Creve Coeur, MO
4.0C year-end 2025
i
Computer — generated by the USTA algorithm from match play
408 matches · 232W–176L · seasons 2018–2026
Match history408 matches
W
2026-10-27 · Peterson 4.0 (FD) · #2 Doubles · 4.0 · with Susan Way
loading the estimate
7-6, 1-4, 1-0
L
2026-10-25 · Peterson (F) · #2 Singles · 4.0
loading the estimate
2-6, 6-7
L
2026-10-18 · Peterson (F) · #2 Doubles · 4.0 · with Amy Johnson
loading the estimate
2-6, 4-6
W
2026-10-13 · Peterson 4.0 (FD) · #2 Doubles · 4.0 · with Susan Way
loading the estimate
6-2, 6-2
W
2026-10-11 · Peterson (F) · #2 Doubles · 4.0 · with Susan Way
loading the estimate
6-0, 6-4
W
2026-10-10 · Woodard/Feldman · #1 Doubles · 8.0 · with Diana Trickey
loading the estimate
6-1, 6-3
L
2026-10-06 · Peterson 4.0 (FD) · #3 Doubles · 4.0 · with Colleen Elliott
loading the estimate
7-5, 2-6, 0-1
L
2026-10-03 · Woodard/Feldman · #2 Doubles · 8.0 · with Felice Rolnick
loading the estimate
4-6, 3-6
L
2026-09-29 · Peterson 4.0 (FD) · #2 Doubles · 4.0 · with Susan Way
loading the estimate
5-7, 3-5
L
2026-09-23 · Peterson · #2 Doubles · 3.0 · with Susan Way
loading the estimate
1-6, 2-6
W
2026-09-22 · Peterson 4.0 (FD) · #2 Doubles · 4.0 · with Susan Way
loading the estimate
6-1, 6-4
L
2026-09-20 · Peterson (F) · #2 Doubles · 4.0 · with Susan Way
loading the estimate
5-7, 3-5
Where you rank locallyagainst everyone at your level
Teams76 teams · 2019–2027
Over timerating by season, and how you rank
By level6 levels played
2.5
2W–0L
not enough matches yet
3.0
40%
14W–21L · 46.1% of games
3.5
85.5%
59W–10L · 66% of games
4.0
51.1%
137W–131L · 51% of games
8.0
45.5%
5W–6L · 48.5% 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, 59% of the time
#1 Singles
59%
239 matches
#2 Singles
15%
62 matches
#2 Doubles
14%
59 matches
#3 Doubles
8%
32 matches
#1 Doubles
3%
14 matches
Singles
1%
2 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