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Christa Nonnemaker

Westlake Village, CA
4.5C year-end 2025
149 matches · 62W–87L · seasons 2019–2026
Bump probability
4.04.55.0lowhigh
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.
3.97
estimated dynamic rating
Where the rating sits now, on 20 matches this season · USTA never publishes this number
64%
down to 4.0
36%
stay 4.5
0%
up to 5.0
Projected to December: 40% down · 60% stay · 0% up, from a year-end estimate of 4.02. Higher than today’s 3.97 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.
i
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
CA · 4.5
150 of 176
By our estimated rating, not the published level.
i
Christa 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

Christa has been a steady 4.5 across all 6 seasons on record.

4.04.5201920222023202420252026

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 4.5, Christa has gone from the 41st to the 37th 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
0.0
12.5%
1W–7L · 45.5% of games
4.5
40%
36W–54L · 47.5% of games
8.0
28.6%
2W–5L · 38.4% of games
9.0
0W–1L
not enough matches yet
0.0mixed
1W–0L
not enough matches yet
8.0mixed
54.8%
17W–14L · 52% of games
9.0mixed
66.7%
4W–2L · 46.1% of games

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

Match history149 matches
L
2026-08-02 · #3 Doubles · 9.0 · with Tanja Daniel
+0.008about as expected — took 41% of games against 39% expected
7-5, 6-4
L
2026-07-11 · #3 Doubles · 8.0 · with Jackie Guinn
expectation pending — we're still fetching an opponent's record
6-2, 6-2
L
2026-07-05 · #1 Doubles · 8.0 · with Mary Kaiser-Cole
expectation pending — we're still fetching an opponent's record
6-3, 4-6, 1-0
W
Monica Bandy / Victoria Silver
2026-07-03 · #3 Doubles · 4.5 · with Sandy Eicher
expectation pending — we're still fetching an opponent's record
6-4, 6-4
W
Ivette Dunlop / Gary Nunesmixed
2026-06-26 · #2 Doubles · 9.0 · with RJ Marozzi
mixed — doesn't count toward your NTRP rating
2-6, 6-3, 1-0
W
Angela Berrett / Sandy Hutchins
2026-06-12 · #2 Doubles · 4.5 · with Sandy Eicher
expectation pending — we're still fetching an opponent's record
3-6, 6-4, 1-0
W
Darcie Ouerbacker / Lisa Moriarty
2026-06-01 · #2 Doubles · 4.5 · with Sandy Eicher
expectation pending — we're still fetching an opponent's record
7-5, 6-4
L
Thomas Hoeg-Jensen / Joanne Pricemixed
2026-05-30 · #3 Doubles · 9.0 · with Bryan Quoc Nguyen
mixed — doesn't count toward your NTRP rating
6-1, 6-2
L
Monica Bandy / Wendy Lorentzen
2026-05-29 · #1 Doubles · 4.5 · with Sandy Eicher
expectation pending — we're still fetching an opponent's record
3-6, 6-3, 1-0
W
N/A
2026-05-22 · #3 Doubles · 4.5 · with Angela Caldwell
expectation pending — we're still fetching an opponent's record
6-0, 6-0
W
Christine Lovett / Lillian Stewart
2026-05-12 · #1 Doubles · 4.5 · with Brooke Gabbey
expectation pending — we're still fetching an opponent's record
6-4, 2-6, 1-0
L
Shelly Costello / Lori Lundring
2026-05-08 · #3 Doubles · 4.5 · with Tanja Daniel
expectation pending — we're still fetching an opponent's record
6-3, 6-4
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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.