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Sondra Power-Thornton

Boise, ID
4.0C year-end 2025
193 matches · 106W–87L · seasons 20212026
Bump probability
3.54.04.5lowhigh

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.

3.57
estimated dynamic rating
Where the rating sits now, on 23 matches this season · USTA never publishes this number
21%
down to 3.5
79%
stay 4.0
0%
up to 4.5
Projected to December: 13% down · 87% stay · 0% up, from a year-end estimate of 3.59. Higher than today’s 3.57 because players this far below their band have historically finished nearer the middle of it.

A 4.0 runs from 3.51 to 4.00. This rating sits in the bottom 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
Boise · 4.0
57 of 59
ID · 4.0
119 of 123

Sondra 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

Sondra has played at 3.5, 4.0 across 6 seasons — 1 move up and 0 down.

3.03.54.0202120222023202420252026

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 4.0, Sondra has gone from the 28th to the 23rd 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 level8 levels played
3.5
82.1%
23W–5L · 61.6% of games
4.0
44.2%
23W–29L · 46.3% of games
4.5
60%
3W–2L · 51.3% of games
7.0
58.8%
10W–7L · 55.2% of games
8.0
47.4%
9W–10L · 52% of games
7.0mixed
50%
3W–3L · 50.8% of games
7.5mixed
41.2%
7W–10L · 53.8% of games
8.0mixed
48%
12W–13L · 52.7% of games

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

Match history193 matches
L
2026-07-31 · #2 Doubles · 4.5 · with Tanya Vaughan
0.035below expectation — took 8% of games against 34% expected
6-0, 6-1
L
2026-07-26 · #2 Doubles · 4.5 · with Angie Magnuson
+0.012about as expected — took 25% of games against 29% expected
6-0, 6-4
W
Monica Gabby / Jenny Grunke
2026-06-10 · #1 Doubles · 4.0 · with Tanya Vaughan
expectation pending — we're still fetching an opponent's record
6-4, 5-7, 1-0
L
Ashley Tribble / Kaley Kosak
2026-06-01 · #1 Doubles · 4.0 · with Karri Jones
expectation pending — we're still fetching an opponent's record
6-1, 6-1
W
Cassie Ewing / Paige Brown
2026-05-27 · #3 Doubles · 4.0 · with Betsy McDonald
expectation pending — we're still fetching an opponent's record
5-7, 6-1, 1-0
L
2026-05-20 · #2 Doubles · 4.0 · with Emily Allen
0.029below expectation — took 20% of games against 39% expected
6-3, 6-0
L
Tina Taylor / Amy Steckel
2026-05-14 · #3 Doubles · 4.0 · with Stacey Strong
expectation pending — we're still fetching an opponent's record
6-1, 6-4
L
2026-05-12 · #1 Doubles · 4.0 · with Angie Magnuson
+0.018better than expected — took 43% of games against 37% expected
5-7, 6-2, 1-0
W
Rachel Boren / Amanda Finnegan
2026-05-07 · #3 Doubles · 4.0 · with Tanya Vaughan
expectation pending — we're still fetching an opponent's record
6-1, 6-1
L
2026-04-30 · #3 Doubles · 4.0 · with Tory Goltry
expectation pending — we're still fetching an opponent's record
6-2, 7-5
W
Joanne Cornwell / Margot Gilna
2026-04-28 · #1 Doubles · 4.0 · with Lauren Noonan
expectation pending — we're still fetching an opponent's record
7-6, 4-6, 1-0
L
Molly Henrie / Noe Lopezmixed
2026-04-18 · #3 Doubles · 8.0 · with Anthony Magnuson
mixed — doesn't count toward your NTRP rating
4-6, 6-3, 1-0
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