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Kochkorn Bailin

Las Vegas, NV
4.5C year-end 2025
234 matches · 134W–100L · seasons 20192026
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.

3.91
estimated dynamic rating
Where the rating sits now, on 4 matches this season · USTA never publishes this number
87%
down to 4.0
13%
stay 4.5
0%
up to 5.0
Projected to December: 62% down · 38% stay · 0% up, from a year-end estimate of 3.98. Higher than today’s 3.91 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
Las Vegas · 4.5
32 of 39
NV · 4.5
51 of 61

Kochkorn 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

Kochkorn has been 4.5 for all 8 seasons on record, but moved a long way inside it — from the bottom of the band to the middle.

4.04.520192020202120222023202420252026

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. 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 4.5, Kochkorn has gone from the 46th to the 88th percentile of players at that level, 2019 to 2025.

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 level6 levels played
4.5
60%
63W–42L · 54.3% of games
5.0
50%
3W–3L · 50% of games
8.0mixed
69.7%
23W–10L · 56.5% of games
8.5mixed
60%
12W–8L · 52.3% of games
9.0mixed
59.1%
26W–18L · 51.5% of games
9.5mixed
21.4%
3W–11L · 39.8% of games

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

Match history234 matches
L
Amy Graybeal / Rachel Calderon Young
2026-02-27 · #2 Doubles · 4.5 · with Brigitte Fallon
0.093below expectation — took 25% of games against 66% expected
6-3, 6-1
L
2026-02-13 · #2 Doubles · 4.5 · with Sarine Weingarten Garcia
0.050below expectation — took 8% of games against 39% expected
6-0, 6-1
W
Rachel Calderon Young / Lesley Chan
2026-02-06 · #2 Doubles · 4.5 · with Lucy Twohy
+0.012better than expected — took 67% of games against 59% expected
6-2, 6-4
L
2026-01-30 · #2 Doubles · 4.5 · with Kendalyn Hartsock
0.018below expectation — took 43% of games against 51% expected
6-3, 6-7, 1-0
L
Tina Back / William Crawfordmixed
2025-04-13 · #1 Doubles · 9.0 · with Quang Bui
+0.000below expectation — took 33% of games against 63% expected
6-2, 6-4
W
Brian Allen / Alex Farley Messermixed
2025-04-06 · #1 Doubles · 9.0 · with Quang Bui
+0.000below expectation — took 41% of games against 68% expected
6-4, 0-6, 1-0
L
Morgan Daley / Alexander van der Endenmixed
2025-03-16 · #2 Doubles · 9.0 · with Quang Bui
+0.000below expectation — took 38% of games against 47% expected
6-3, 7-5
W
V Kate Ferguson
2025-02-22 · #1 Singles · 4.5
+0.024better than expected — took 75% of games against 60% expected
6-0, 6-4
L
2025-02-15 · #3 Doubles · 4.5 · with Hillary Hall
0.018below expectation — took 37% of games against 46% expected
6-4, 6-3
L
2025-02-08 · #1 Singles · 4.5
+0.005about as expected — took 47% of games against 44% expected
2-6, 6-2, 1-0
W
Christine Blake / Ui Afualo
2025-02-01 · #2 Doubles · 4.5 · with Brigitte Fallon
+0.013better than expected — took 71% of games against 61% expected
6-4, 6-1
W
Teri Chan Palomaki
2025-01-25 · #1 Singles · 4.5
+0.071better than expected — took 70% of games against 38% expected
6-3, 1-0
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