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Karla Sperber

Renton, WA
3.5C year-end 2025
210 matches · 132W–78L · seasons 2019–2026
Bump probability
3.03.54.0lowhigh

Where this rating stands today. Taller means more likely. The dashed lines are the band edges, and the three shaded areas are the three percentages below.

3.35
estimated dynamic rating
Where the rating sits now, on 24 matches this season · USTA never publishes this number
0%
down to 3.0
97%
stay 3.5
3%
up to 4.0
Projected to December: 0% down · 99% stay · 1% up, from a year-end estimate of 3.31. Lower than today’s 3.35 because form regresses — players this far into their band partway through a season have historically finished nearer the middle of it. Keep playing at this level and the numbers above are the ones that hold.

A 3.5 runs from 3.01 to 3.50. This rating sits in the upper half of the band, and every match moves it.

Our estimate, not a USTA figure — scale measured at this point of 2023 on 2160 players. Graded publicly in December when USTA publishes year-end ratings. It moves when you play, and occasionally when we improve the model.

Where you rank
Renton · 3.5
6 of 13
WA · 3.5
409 of 1209

Karla is ranked among players at the same level in the same place, by our estimated dynamic rating — not the published level, which is the same for everyone in the band. Groups smaller than five are not ranked, because a placing out of two is noise dressed as standing.

Over timerating by season, and how you rank
Rating by season

Karla has been a steady 3.5 across all 8 seasons on record.

3.03.520192020202120222023202420252026

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 3.5, Karla has gone from the 90th to the 61st percentile of players at that level, 2019 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 level7 levels played
3.5
72%
72W–28L · 56.7% of games
4.0
40%
16W–24L · 43.3% of games
6.0
2W–0L
not enough matches yet
7.0
1W–2L
not enough matches yet
6.0mixed
77.8%
7W–2L · 70.7% of games
7.0mixed
64.9%
24W–13L · 54.7% of games
8.0mixed
60%
6W–4L · 55.3% of games

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

Match history210 matches
W
Cheryl Borgonia / Noelani da Silva
2026-07-28 · #1 Doubles · 3.5 · with Dina Apostolou
−0.006about as expected — took 67% of games against 64% expected
6-2, 6-4
W
2026-07-27 · #1 Doubles · 3.5 · with Dina Apostolou
+0.020better than expected — took 75% of games against 61% expected
6-3, 6-1
W
2026-07-17 · #1 Doubles · 7.0 · with Ted Schneider
+0.000about as expected — took 59% of games against 59% expected
6-3, 7-6
W
Laura Cooper / Tanja Omeze
2026-07-11 · #1 Doubles · 3.5 · with Toby Miller
−0.019below expectation — took 50% of games against 59% expected
6-4, 3-6, 1-0
L
Gina Gentry / David Mannmixed
2026-06-27 · #2 Doubles · 7.0 · with Chiyo Lai
+0.000below expectation — took 48% of games against 57% expected
5-7, 6-4, 1-0
W
2026-06-14 · #2 Doubles · 7.0 · with Matthew Zlateff
+0.000about as expected — took 54% of games against 49% expected
6-7, 7-5, 1-0
L
Caitlin Baker / Chuan-Ling Yeh
2026-05-30 · #1 Doubles · 3.5 · with Miri Rogers
+0.014better than expected — took 50% of games against 43% expected
7-6, 5-7, 1-0
W
2026-05-15 · #2 Doubles · 3.5 · with Miri Rogers
+0.008better than expected — took 63% of games against 58% expected
6-3, 6-4
W
Asha DSouza / Lisa Tillman
2026-05-09 · #3 Doubles · 3.5 · with Sally Revere
+0.028better than expected — took 75% of games against 58% expected
6-1, 6-3
W
2026-05-02 · #2 Doubles · 3.5 · with Miri Rogers
+0.027better than expected — took 65% of games against 51% expected
4-6, 6-0, 1-0
W
Catherine Maxson / Kara Palmer
2026-04-25 · #2 Doubles · 3.5 · with Miri Rogers
−0.009below expectation — took 48% of games against 53% expected
7-5, 2-6, 1-0
L
2026-04-17 · #3 Doubles · 3.5 · with Kristi Edwards
−0.017below expectation — took 25% of games against 38% expected
6-3, 6-1
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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.