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Lydia Sun

Kirkland, WA
4.5C year-end 2025
73 matches · 46W–27L · 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.

4.14
estimated dynamic rating
Where the rating sits now, on 14 matches this season · USTA never publishes this number
4%
down to 4.0
96%
stay 4.5
0%
up to 5.0

A 4.5 runs from 4.01 to 4.50. This rating sits in the lower half 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
Kirkland · 4.5
4 of 10
WA · 4.5
135 of 364

Lydia 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.

Teams61 teams · 2012–2027
Over timerating by season, and how you rank
Rating by season

Lydia has played at 4.0, 4.5 across 3 seasons — 1 move up and 0 down.

3.54.04.5201920212026

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, Lydia has gone from the 97th to the 85th percentile of players at that level, 2019 to 2021.

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
85.7%
12W–2L · 64% of games
4.5
50%
6W–6L · 52.2% of games
7.0mixed
20%
1W–4L · 41.7% of games
8.0mixed
66.7%
8W–4L · 60.3% of games
9.0mixed
61.9%
13W–8L · 53.7% of games

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

Match history73 matches
W
2026-07-25 · HBSQ-Hoy · #1 Doubles · 9.0 · with Luke Barry
+0.000about as expected — took 61% of games against 60% expected
4-6, 6-1, 1-0
L
2026-07-17 · CP-DosServeAces-Purohit · #3 Doubles · 8.0 · with Oliver Graves
+0.000below expectation — took 40% of games against 47% expected
6-4, 6-4
W
2026-06-21 · CP-DosServeAces-Purohit · #3 Doubles · 8.0 · with Oliver Graves
+0.000better than expected — took 60% of games against 54% expected
6-1, 5-7, 1-0
W
2026-06-20 · HBSQ-Hoy · #2 Doubles · 9.0 · with Luke Barry
+0.000better than expected — took 75% of games against 63% expected
6-1, 6-3
W
2026-06-07 · CP-McSun-McRoberts · #1 Doubles · 4.5 · with Katie McRoberts
0.008about as expected — took 60% of games against 61% expected
6-4, 6-4
W
2026-05-30 · CP-McSun-McRoberts · #1 Doubles · 4.5 · with Katie McRoberts
+0.003about as expected — took 65% of games against 60% expected
7-5, 6-2
L
2026-05-02 · CP-McSun-McRoberts · #3 Doubles · 4.5 · with Laurie Ono
0.051below expectation — took 37% of games against 60% expected
6-3, 6-4
L
2026-04-25 · CP-McSun-McRoberts · #1 Doubles · 4.5 · with Katie McRoberts
0.021below expectation — took 45% of games against 54% expected
4-6, 6-3, 1-0
W
2026-04-12 · CP-McSun-McRoberts · #1 Doubles · 4.5 · with Katie McRoberts
0.034below expectation — took 60% of games against 69% expected
6-3, 6-5
W
Ben Chia / Anya Dalkinmixed
2025-10-26 · AYTC-Higashi · #3 Doubles · 8.0 · with Ryan Nghi
+0.000better than expected — took 100% of games against 54% expected
6-0, 6-0
W
Olivia Shone / Jason Kimmixed
2025-10-18 · AYTC-Higashi · #3 Doubles · 8.0 · with Ryan Nghi
+0.000about as expected — took 56% of games against 51% expected
3-6, 6-2, 1-0
W
Julia Calin / Ethan Griffithmixed
2025-09-27 · WSC-The 9.0 Terrors-Shen · #3 Doubles · 9.0 · with Ryan Hoy
+0.000better than expected — took 63% of games against 55% expected
6-4, 6-3
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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.