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Courtney Stiefel

Seattle, WA
4.5C year-end 2025
39 matches · 24W–15L · seasons 20232026
Bump probability
4.04.55.0lowhigh

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.

3.98
estimated dynamic rating
Where the rating sits now, on 4 matches this season · USTA never publishes this number
58%
down to 4.0
42%
stay 4.5
0%
up to 5.0
Projected to December: 35% down · 65% stay · 0% up, from a year-end estimate of 4.03. Higher than today’s 3.98 because players this far below their band have historically finished nearer the middle of it.

A 4.5 runs from 4.01 to 4.50. 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
Seattle · 4.5
70 of 103
WA · 4.5
261 of 364

Courtney 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

Courtney has played at 4.0, 4.5 across 4 seasons — 1 move up and 0 down.

3.54.04.52023202420252026

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. The smaller, faded points — 2026 — rest on fewer than 5 matches, where the estimate is mostly the level the player was entered at rather than anything they did on court. Read the shape, not the value.

How you rank at your level
At 4.0, Courtney has gone from the 81st to the 91st percentile of players at that level, 2023 to 2024.

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 level5 levels played
4.0
77.3%
17W–5L · 63% of games
4.5
30%
3W–7L · 41.5% of games
7.0mixed
1W–0L
not enough matches yet
8.0mixed
0W–3L
not enough matches yet
9.0mixed
2W–0L
not enough matches yet

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

Match history39 matches
L
Kimberly Aigner / Carmen Zlateff
2026-04-25 · #1 Doubles · 4.5 · with Janine VanderWhitte
0.028below expectation — took 35% of games against 49% expected
7-5, 6-2
L
2026-04-11 · #1 Doubles · 4.5 · with Elizabeth Fletcher
0.009below expectation — took 37% of games against 43% expected
6-3, 6-4
L
2026-02-28 · #2 Doubles · 4.5 · with Elizabeth Fletcher
+0.014about as expected — took 33% of games against 33% expected
6-4, 6-2
W
2026-01-11 · #2 Doubles · 4.5 · with Elizabeth Fletcher
+0.046better than expected — took 71% of games against 47% expected
6-3, 6-2
L
2025-07-23 · #1 Doubles · 4.5 · with Elizabeth Fletcher
+0.021about as expected — took 33% of games against 31% expected
6-3, 6-3
W
2025-07-20 · #2 Doubles · 9.0 · with Mark Ball
+0.000better than expected — took 67% of games against 44% expected
6-2, 6-4
L
2025-07-19 · #1 Doubles · 8.0 · with Ethan Chung
+0.000below expectation — took 29% of games against 37% expected
6-3, 6-2
W
2025-07-05 · #3 Doubles · 9.0 · with Mark Ball
+0.000better than expected — took 67% of games against 47% expected
6-4, 6-2
L
2025-06-28 · #1 Doubles · 4.5 · with Janine VanderWhitte
0.052below expectation — took 35% of games against 59% expected
7-5, 6-2
W
Irena Urbas / Tonya Whitlock
2025-05-18 · #2 Doubles · 4.5 · with Elizabeth Fletcher
0.007about as expected — took 52% of games against 56% expected
4-6, 6-4, 1-0
L
Molly Klein / Erin Troedson
2025-05-04 · #1 Doubles · 4.5 · with Elizabeth Fletcher
+0.028better than expected — took 38% of games against 31% expected
6-3, 7-5
W
Dana Landry / Jennifer Johnson
2025-05-02 · #2 Doubles · 4.0 · with Stephanie Welsh
0.016about as expected — took 80% of games against 75% expected
6-2, 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.