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Harriet Isaac

Oceanside, CA
4.0C year-end 2025
43 matches · 13W–30L · seasons 2022–2026
Bump probability
3.54.04.5lowhigh
Where this rating stands today. Taller means more likely.
i
The dashed lines are the edges of your band. The three shaded areas are exactly the three percentages below — area here is the chance of one outcome for you, not a count of players.
3.68
estimated dynamic rating
Where the rating sits now, on 9 matches this season · USTA never publishes this number
1%
down to 3.5
99%
stay 4.0
0%
up to 4.5

A 4.0 runs from 3.51 to 4.00. This rating sits in the lower half of the band, and every match moves it.

Our estimate, not a USTA figure.
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scale measured at this point of 2023 on 2160 players. It moves when you play, and occasionally when we improve the model. USTA publishes year-end ratings in December, which is when this gets graded against what actually happened.
Where you rank
Oceanside · 4.0
4 of 5
CA · 4.0
183 of 259
By our estimated rating, not the published level.
i
Harriet is ranked against players at the same level in the same place. The published level is identical for everyone in a band, so it cannot separate them — our estimate can. Groups smaller than five are not ranked at all, because a placing out of two is noise dressed as standing.
Over timerating by season, and how you rank
Rating by season

Harriet has been a steady 4.0 across all 4 seasons on record.

3.54.02022202320252026

The line is our estimate; the horizontal lines are level boundaries, so crossing one is a bump. Hollow points are years we inferred from the level played the following season, because USTA publishes a current rating but no history.

How you rank at your level
At 8.0, Harriet has gone from the 1st to the 21st percentile of players at that level, 2022 to 2026.

Percentile compares the same level in the same season, by share of games won. Mixed is shown for context — USTA rules exclude it from your adult rating unless mixed is all you play.

By level3 levels played
4.0
30.8%
4W–9L · 40.5% of games
8.0
25%
4W–12L · 43% of games
8.0mixed
35.7%
5W–9L · 43% of games

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

Match history43 matches
L
Debbie Gerlack / Debbie McBride
2026-08-02 · #3 Doubles · 8.0 · with Maeve Brick
expectation pending — we're still fetching an opponent's record
6-4, 7-6
L
2026-07-29 · #3 Doubles · 8.0 · with Laurie Dunn
expectation pending — we're still fetching an opponent's record
6-3, 3-6, 1-0
L
Anne Reese / Yoon Choi
2026-07-15 · #1 Doubles · 8.0 · with Vicky Wolfe
expectation pending — we're still fetching an opponent's record
3-6, 6-3, 1-0
L
2026-07-12 · #1 Doubles · 8.0 · with Jennifer Kries
+0.027about as expected — took 33% of games against 29% expected
6-3, 6-3
W
Salma Ott / Colleen Roth
2026-07-08 · #3 Doubles · 8.0 · with Laurie Dunn
expectation pending — we're still fetching an opponent's record
6-7, 7-5, 1-0
L
Patricia Sherman / Nelda Swanson
2026-06-28 · #2 Doubles · 8.0 · with Jennifer Kries
expectation pending — we're still fetching an opponent's record
6-3, 6-3
L
2026-05-03 · #1 Doubles · 4.0 · with Jennifer Kries
−0.012below expectation — took 25% of games against 37% expected
6-3, 6-1
L
Zhuoling Jia / Benoit Picardmixed
2026-04-25 · #2 Doubles · 8.0 · with Hartley Miller
mixed — doesn't count toward your NTRP rating
6-0, 6-0
W
Shelley Federhart / Cindy S Miers
2026-04-20 · #1 Doubles · 4.0 · with Jennifer Kries
expectation pending — we're still fetching an opponent's record
6-3, 6-1
L
Lisa Moses / Frances Schnall
2025-07-30 · #3 Doubles · 8.0 · with Louise Stapley
expectation pending — we're still fetching an opponent's record
6-2, 6-3
L
2025-07-23 · #3 Doubles · 8.0 · with Louise Stapley
expectation pending — we're still fetching an opponent's record
6-2, 6-4
L
Ken Moran / Catherine Bairdmixed
2025-07-19 · #3 Doubles · 8.0 · with Jerry Storvold
mixed — doesn't count toward your NTRP rating
6-0, 7-5
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Not affiliated with or endorsed by the USTA. Rating shown is the published USTA year-end figure; match data is from USTA TennisLink.