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Tiffany Kellogg

La Jolla, CA
4.5C year-end 2025
239 matches · 151W–88L · seasons 2022–2026
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.
4.31
estimated dynamic rating
Where the rating sits now, on 38 matches this season · USTA never publishes this number
0%
down to 4.0
99%
stay 4.5
1%
up to 5.0

A 4.5 runs from 4.01 to 4.50. This rating sits in the upper half 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
15 of 89
By our estimated rating, not the published level.
i
Tiffany 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

Tiffany has been 4.5 for all 5 seasons on record, but moved a long way inside it — from the bottom of the band to the top.

4.04.520222023202420252026

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, Tiffany has gone from the 67th to the 68th 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 level5 levels played
4.5
68.5%
74W–34L · 58.1% of games
5.0
22.7%
5W–17L · 38.9% of games
7.5mixed
75%
3W–1L · 58.4% of games
8.0mixed
59.3%
16W–11L · 53.9% of games
9.0mixed
78.9%
30W–8L · 61.5% of games

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

Match history239 matches
W
2026-07-22 · #1 Doubles · 9.0 · with James Kellogg
mixed — doesn't count toward your NTRP rating
6-1, 6-1
L
Joy Zheng / Elizabeth Zebian
2026-07-21 · #2 Doubles · 5.0 · with Alexia Palacios-Peters
expectation pending — we're still fetching an opponent's record
7-5, 7-6
W
Amy Thompson / Teresa Downey
2026-07-17 · #1 Doubles · 4.5 · with Kristin Gibson
expectation pending — we're still fetching an opponent's record
6-4, 6-4
W
Shelby Rubin / Grace Yao
2026-07-14 · #1 Doubles · 5.0 · with Valerie Tan
expectation pending — we're still fetching an opponent's record
6-4, 7-6
W
Daniel Lee / ANGIE CRAWFORDmixed
2026-07-11 · #1 Doubles · 8.0 · with Mark Chen
mixed — doesn't count toward your NTRP rating
3-6, 6-3, 1-0
L
2026-07-03 · #1 Doubles · 4.5 · with Dorian Sailer
−0.042below expectation — took 29% of games against 51% expected
6-2, 6-3
L
2026-06-30 · #2 Doubles · 5.0 · with Elizabeth Workman
expectation pending — we're still fetching an opponent's record
6-4, 6-0
W
Kathleen Culver / Scott Calhounmixed
2026-06-27 · #2 Doubles · 8.0 · with Adam Hoch
mixed — doesn't count toward your NTRP rating
6-2, 6-0
W
Sheena Patel / Guadalupe Rendon
2026-06-20 · #1 Doubles · 4.5 · with ERIN HUGHES
expectation pending — we're still fetching an opponent's record
6-4, 6-2
W
2026-06-14 · #2 Doubles · 4.5 · with Kristin Gibson
expectation pending — we're still fetching an opponent's record
6-2, 7-5
W
Carla Hansen / Kendal Texeira
2026-06-06 · #1 Doubles · 4.5 · with Elizabeth Workman
expectation pending — we're still fetching an opponent's record
7-6, 6-3
L
William Chiu / Cindy Limmixedchamps
2026-05-31 · #1 Doubles · with Jeff Ray
mixed — doesn't count toward your NTRP rating
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.