Jaok Koo
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San Jose, CA
23 matches · 11W–12L · seasons 2019–2025
Match history23 matches
Teams9 teams · 2019–2025
Over timerating by season, and how you rank
By level2 levels played
4.5
47.6%
10W–11L · 50.9% of games
7.0mixed
1W–1L
not enough matches yet
Games won matters more than matches won — NTRP adjusts on margins.
By lineusually #3 Doubles, 52% of the time
#3 Doubles
52%
12 matches
#2 Doubles
35%
8 matches
#1 Doubles
13%
3 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.
Tennis is mostly mental. You win or lose the match before you even go out there.