Jennifer Koo
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San Francisco, CA
124 matches · 62W–62L · seasons 2021–2026
Match history124 matches
Where you rank locallyagainst everyone at your level
Teams37 teams · 2021–2026
Over timerating by season, and how you rank
By level4 levels played
3.5
47.5%
29W–32L · 49.2% of games
4.0
32.3%
10W–21L · 40.8% of games
6.5
85.7%
6W–1L · 53.6% of games
7.5
68%
17W–8L · 53.6% of games
Games won matters more than matches won — NTRP adjusts on margins.
By lineusually #1 Doubles, 48% of the time
#1 Doubles
48%
60 matches
#2 Doubles
24%
30 matches
#3 Doubles
23%
29 matches
#1 Singles
4%
5 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.
You always want to win. That is why you play tennis, because you love the sport and try to be the best you can.