Kayla Day
all rivalries →| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| Madison Keys | 1 | 2 | 3 | Jun 30, 2026 | H2H |
| Caroline Dolehide | 0 | 2 | 2 | Apr 3, 2024 | H2H |
| Marie Bouzkova | 0 | 2 | 2 | Oct 12, 2023 | H2H |
| Garbiñe Muguruza | 0 | 2 | 2 | Aug 4, 2017 | H2H |
| Shuai Zhang | 0 | 1 | 1 | Aug 15, 2026 | H2H |
H2H data updated: 2026-09-14 00:00 UTC
Kayla Day vs Carol Zhao
Compare the head-to-head record, career totals, season-by-season performance, and match log for Kayla Day vs Carol Zhao.
Want to explore more matchups? Advanced rivalry search lets you browse current and historical rivalries, unbeaten records, or every matchup for a player.
H2H
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0 main-draw meetings
H2H Match Log
| Player | Score | Player | Match Data | Date | Round | Tournament | Category | Surface |
|---|---|---|---|---|---|---|---|---|
| Kayla Day | 6-4 3-6 7-6(6) | Carol Zhao | Match data | Jul 30, 2022 | Q1 | San Jose | WTA 500 | Hard |
1 qualifying meeting shown in the table; qualifying is excluded from the H2H score. Arrows show an edition's recorded category and documented modern equivalent; unresolved editions keep their recorded category. Asterisked totals include editions mapped from documented historical predecessor categories. Mapping details.
Career Comparison
| Player | Current | Peak | Pts | Elo | W | L | Win % | GS | 1000 including documented historical predecessor categories | Finals | 500 including documented historical predecessor categories | 250 including documented historical predecessor categories | Titles |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Kayla Day | #117 | #84 | 847 | 1,637 | 9 | 29 | 23.7% | 0 | 0 | 0 | 0 | 0 | 0 |
| Carol Zhao | #432 | #131 | 458 | 1,515 | 5 | 21 | 19.2% | 0 | 0 | 0 | 0 | 0 | 0 |
Career Progression by Age
Seasons are aligned by the age each player spent most of that calendar year. GS and Titles are cumulative career totals through that season.
| Age | Kayla Day | Carol Zhao | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | W-L | Win % | Rank | Elo | GS | Titles | Yr | W-L | Win % | Rank | Elo | GS | Titles | |
| 16 | 2016 | 1–2 | 33.3% | #198 | 1,540 | 0 | 0 | — | — | — | — | — | — | — |
| 17 | 2017 | 3–5 | 37.5% | #150 | 1,524 | 0 | 0 | — | — | — | — | — | — | — |
| 18 | 2018 | 0–2 | 0.0% | #313 | 1,487 | 0 | 0 | 2013 | 0–1 | 0.0% | #461 | 1,493 | 0 | 0 |
| 19 | — | — | — | — | — | — | — | 2014 | 1–1 | 50.0% | #293 | 1,513 | 0 | 0 |
| 20 | — | — | — | — | — | — | — | 2015 | 0–2 | 0.0% | #343 | 1,488 | 0 | 0 |
| 21 | — | — | — | — | — | — | — | 2016 | 0–2 | 0.0% | #498 | 1,462 | 0 | 0 |
| 22 | 2022 | 0–2 | 0.0% | #197 | 1,534 | 0 | 0 | 2017 | 0–1 | 0.0% | #149 | 1,452 | 0 | 0 |
| 23 | 2023 | 3–6 | 33.3% | #87 | 1,564 | 0 | 0 | 2018 | 0–3 | 0.0% | #299 | 1,446 | 0 | 0 |
| 24 | 2024 | 0–7 | 0.0% | #241 | 1,435 | 0 | 0 | — | — | — | — | — | — | — |
| 26 | 2026 | 2–5 | 28.6% | #117 | 1,604 | 0 | 0 | 2021 | 0–1 | 0.0% | #290 | 1,416 | 0 | 0 |
| 27 | — | — | — | — | — | — | — | 2022 | 1–3 | 25.0% | #176 | 1,399 | 0 | 0 |
| 28 | — | — | — | — | — | — | — | 2023 | 2–4 | 33.3% | #219 | 1,441 | 0 | 0 |
| 29 | — | — | — | — | — | — | — | 2024 | 1–2 | 33.3% | #246 | 1,419 | 0 | 0 |
| 31 | — | — | — | — | — | — | — | 2026 | 0–1 | 0.0% | #432 | 1,351 | 0 | 0 |
Surface Results by Age
Seasons are aligned by the age each player spent most of that calendar year. Results cover completed main-draw matches. Bold green marks the higher win percentage when both players have at least 5 matches on that surface at the aligned age.
| Age | Kayla Day | Carol Zhao | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | Hard | Clay | Grass | Yr | Hard | Clay | Grass | |||||||||||||||||||
| W | L | M | Win % | W | L | M | Win % | W | L | M | Win % | W | L | M | Win % | W | L | M | Win % | W | L | M | Win % | |||
| 16 | 2016 | 1 | 2 | 3 | 33.3% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 17 | 2017 | 3 | 4 | 7 | 42.9% | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 18 | 2018 | 0 | 2 | 2 | 0.0% | — | — | — | — | — | — | — | — | 2013 | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — |
| 19 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2014 | 1 | 1 | 2 | 50.0% | — | — | — | — | — | — | — | — |
| 20 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2015 | 0 | 2 | 2 | 0.0% | — | — | — | — | — | — | — | — |
| 21 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2016 | 0 | 2 | 2 | 0.0% | — | — | — | — | — | — | — | — |
| 22 | 2022 | 0 | 2 | 2 | 0.0% | — | — | — | — | — | — | — | — | 2017 | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — |
| 23 | 2023 | 1 | 4 | 5 | 20.0% | 2 | 2 | 4 | 50.0% | — | — | — | — | 2018 | 0 | 2 | 2 | 0.0% | 0 | 1 | 1 | 0.0% | — | — | — | — |
| 24 | 2024 | 0 | 3 | 3 | 0.0% | 0 | 3 | 3 | 0.0% | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 26 | 2026 | 2 | 3 | 5 | 40.0% | 0 | 1 | 1 | 0.0% | 0 | 1 | 1 | 0.0% | 2021 | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — |
| 27 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2022 | 1 | 2 | 3 | 33.3% | 0 | 1 | 1 | 0.0% | — | — | — | — |
| 28 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2023 | 0 | 1 | 1 | 0.0% | 1 | 1 | 2 | 50.0% | 1 | 2 | 3 | 33.3% |
| 29 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2024 | 1 | 2 | 3 | 33.3% | — | — | — | — | — | — | — | — |
| 31 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2026 | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — |
| Career | — | 7 | 20 | 27 | 25.9% | 2 | 7 | 9 | 22.2% | 0 | 2 | 2 | 0.0% | — | 3 | 16 | 19 | 15.8% | 1 | 3 | 4 | 25.0% | 1 | 2 | 3 | 33.3% |
Performance Progression by Age
Seasons are aligned by the age each player spent most of that calendar year. Detailed serve and return statistics available for 38/39 of Kayla Day's and 26/26 of Carol Zhao's main draw matches. Sample is shown as matches with detailed serve and return statistics / total main draw matches. Bold green marks the stronger value when both stat samples contain at least 5 matches; lower is better for DFs/M.
| Age | Kayla Day | Carol Zhao | ||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | Sample | Aces/M | DFs/M | 1st Sv% | 1st Pts% | 2nd Pts% | BP Saved% | BP Conv% | Svc Pts% | Ret Pts% | Yr | Sample | Aces/M | DFs/M | 1st Sv% | 1st Pts% | 2nd Pts% | BP Saved% | BP Conv% | Svc Pts% | Ret Pts% | |
| 16 | 2016 | 3/3 | 1.0 | 3.7 | 59.0% | 55.2% | 30.3% | 50.6% | 66.7% | 44.4% | 38.1% | — | —/— | — | — | — | — | — | — | — | — | — |
| 17 | 2017 | 8/8 | 3.4 | 5.5 | 48.8% | 66.2% | 45.1% | 51.9% | 31.0% | 55.7% | 38.9% | — | —/— | — | — | — | — | — | — | — | — | — |
| 18 | 2018 | 2/2 | 5.0 | 6.0 | 48.1% | 68.0% | 33.7% | 50.0% | 35.0% | 49.8% | 33.8% | 2013 | 1/1 | 1.0 | 2.0 | 45.2% | 47.4% | 26.1% | 25.0% | 100.0% | 35.7% | 38.0% |
| 19 | — | —/— | — | — | — | — | — | — | — | — | — | 2014 | 2/2 | 2.5 | 2.0 | 57.4% | 68.3% | 37.9% | 58.3% | 66.7% | 55.5% | 40.2% |
| 20 | — | —/— | — | — | — | — | — | — | — | — | — | 2015 | 2/2 | 2.0 | 3.5 | 46.7% | 44.0% | 47.7% | 58.3% | 10.0% | 46.5% | 34.9% |
| 21 | — | —/— | — | — | — | — | — | — | — | — | — | 2016 | 2/2 | 2.5 | 4.0 | 57.0% | 59.8% | 34.4% | 46.9% | 41.7% | 49.2% | 39.6% |
| 22 | 2022 | 2/2 | 4.0 | 2.5 | 66.5% | 68.4% | 39.1% | 56.4% | 50.0% | 58.6% | 36.6% | 2017 | 1/1 | 2.0 | 7.0 | 56.3% | 71.4% | 50.0% | 0.0% | 75.0% | 62.1% | 34.1% |
| 23 | 2023 | 9/9 | 2.2 | 3.0 | 58.1% | 62.9% | 43.8% | 57.4% | 39.7% | 55.0% | 39.3% | 2018 | 3/3 | 0.3 | 6.0 | 58.3% | 59.2% | 38.9% | 49.9% | 23.7% | 50.7% | 34.9% |
| 24 | 2024 | 7/7 | 3.7 | 3.3 | 66.8% | 58.5% | 42.2% | 52.8% | 37.1% | 55.1% | 36.5% | — | —/— | — | — | — | — | — | — | — | — | — |
| 26 | 2026 | 7/8 | 4.0 | 3.4 | 65.3% | 59.9% | 47.4% | 52.6% | 46.8% | 55.8% | 40.7% | 2021 | 1/1 | 0.0 | 6.0 | 61.7% | 58.6% | 33.3% | 33.3% | 100.0% | 48.9% | 34.0% |
| 27 | — | —/— | — | — | — | — | — | — | — | — | — | 2022 | 4/4 | 2.3 | 4.0 | 63.5% | 62.6% | 45.1% | 57.8% | 29.2% | 55.9% | 40.6% |
| 28 | — | —/— | — | — | — | — | — | — | — | — | — | 2023 | 6/6 | 2.0 | 10.2 | 68.2% | 59.8% | 30.0% | 44.9% | 49.8% | 50.2% | 41.1% |
| 29 | — | —/— | — | — | — | — | — | — | — | — | — | 2024 | 3/3 | 3.0 | 12.3 | 62.9% | 71.8% | 27.1% | 55.0% | 45.7% | 54.6% | 43.1% |
| 31 | — | —/— | — | — | — | — | — | — | — | — | — | 2026 | 1/1 | 0.0 | 10.0 | 59.8% | 61.5% | 42.9% | 58.3% | 42.9% | 54.0% | 35.8% |
| Career | — | 38/39 | 3.2 | 3.8 | 59.1% | 62.2% | 42.6% | 53.5% | 41.1% | 54.4% | 38.4% | — | 26/26 | 1.8 | 6.8 | 60.5% | 61.0% | 36.6% | 48.4% | 45.3% | 51.7% | 39.0% |
Advanced Statistics Comparison by Age
Seasons are aligned by the age each player spent most of that calendar year. Metrics use eligible main-draw results; point statistics use matches with detailed data. Bold green marks the stronger value when both underlying samples are sufficient. Lower is better for Schedule because a negative value means a tougher schedule. Career Schedule is normalized per 100 matches.
| Age | Kayla Day | Carol Zhao | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | Elo | P+ | Serve+ | Return+ | PD | TPW% | Hard Elo | Clay Elo | Grass Elo | Set Win % | Set Margin | Dec. Set | Tiebreak | Pressure+ | Schedule | Yr | Elo | P+ | Serve+ | Return+ | PD | TPW% | Hard Elo | Clay Elo | Grass Elo | Set Win % | Set Margin | Dec. Set | Tiebreak | Pressure+ | Schedule | |
| 16 | 2016 | 1540 | 107.8 | -2.89 | +0.53 | 0.685 | 42.0% | +14 | — | — | 0.0% | -4.75 | — | — | — | -0.17 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 17 | 2017 | 1524 | 111.0 | 0.00 | -2.37 | 0.877 | 47.2% | +13 | — | — | 45.0% | -0.85 | 1–3 (25%) | — | — | -0.14 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 18 | 2018 | 1487 | 91.2 | -2.87 | -2.16 | 0.673 | 41.8% | — | — | — | 20.0% | -3.20 | 0–1 | — | — | +0.16 | 2013 | 1494 | 101.4 | -1.52 | +2.05 | 0.591 | 37.0% | — | — | — | 0.0% | -4.00 | — | — | — | -0.04 |
| 19 | 2019 | 1463 | 99.5 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2014 | 1513 | 104.2 | +0.20 | 0.00 | 0.903 | 48.0% | — | — | — | 0.0% | -5.00 | — | — | — | -0.02 |
| 20 | 2020 | 1450 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2015 | 1489 | 92.9 | -2.27 | -1.66 | 0.653 | 41.1% | — | — | — | 0.0% | -4.75 | — | — | — | +0.27 |
| 21 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2016 | 1462 | 102.6 | -0.28 | -1.04 | 0.779 | 44.2% | — | — | — | 20.0% | -2.40 | 0–1 | — | — | +0.02 |
| 22 | 2022 | 1535 | 99.5 | -0.90 | -1.76 | 0.884 | 47.0% | — | — | — | 0.0% | -2.00 | — | 0–1 | — | +0.44 | 2017 | 1452 | 99.2 | -0.88 | +2.61 | 0.898 | 47.8% | — | — | — | 33.3% | -1.00 | 0–1 | 0–1 | — | +0.11 |
| 23 | 2023 | 1565 | 118.9 | -0.78 | -1.35 | 0.874 | 47.7% | -48 | +5 | — | 31.6% | -0.84 | 1–0 | 0–1 | — | +0.61 | 2018 | 1446 | 88.1 | -1.92 | -3.65 | 0.707 | 42.6% | — | — | — | 25.0% | -2.75 | 0–2 | 1–0 | — | +0.10 |
| 24 | 2024 | 1436 | 102.7 | -2.31 | -3.54 | 0.812 | 46.2% | -2 | +63 | — | 22.2% | -1.61 | 0–4 (0%) | 1–3 (25%) | 92.8 | +0.78 | 2019 | 1448 | 97.7 | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 25 | 2025 | 1474 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 26 | 2026 | 1604 | 129.8 | -0.29 | -0.02 | 0.921 | 48.5% | -18 | — | — | 35.3% | -0.94 | 1–2 (33%) | 1–1 | — | -0.59 | 2021 | 1416 | 93.8 | +3.05 | -3.36 | 0.665 | 41.0% | — | — | — | 0.0% | -3.50 | — | — | — | -0.01 |
| 27 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2022 | 1400 | 100.5 | -0.44 | -2.01 | 0.921 | 48.1% | -28 | — | — | 33.3% | -0.56 | 0–1 | 0–1 | — | +0.31 |
| 28 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2023 | 1441 | 101.4 | -2.20 | -1.23 | 0.826 | 45.7% | — | — | +178 | 35.7% | -1.43 | 1–1 | 3–0 (100%) | — | +0.38 |
| 29 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2024 | 1420 | 100.0 | -1.37 | +0.79 | 0.951 | 48.9% | +16 | — | — | 42.9% | -0.14 | 0–1 | 0–1 | — | +0.17 |
| 30 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2025 | 1397 | 93.9 | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 31 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2026 | 1352 | 93.4 | -2.87 | -1.19 | 0.779 | 45.2% | — | — | — | 33.3% | -1.67 | 0–1 | — | — | -0.03 |
| Career | — | 1637 | 116.0 | -1.09 | -1.64 | 0.842 | 46.7% | -9 | +30 | — | 29.9% | -1.39 | 3–10 (23%) | 2–6 (25%) | 91.1 | +2.87 | — | 1515 | 95.5 | -1.22 | -1.13 | 0.808 | 45.3% | -6 | — | +178 | 27.1% | -1.90 | 1–8 (11%) | 4–3 (57%) | 94.0 | +4.85 |
Career Rivalries
Each player's five most-played main-draw opponents. The current matchup is highlighted when it appears in a player's top five.
Carol Zhao
all rivalries →| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| Sara Sorribes Tormo | 0 | 2 | 2 | Aug 11, 2021 | H2H |
| Magda Linette | 0 | 1 | 1 | Aug 3, 2026 | H2H |
| Diana Shnaider | 0 | 1 | 1 | Sep 20, 2024 | H2H |
| Dayeon Back | 1 | 0 | 1 | Sep 19, 2024 | H2H |
| Petra Martic | 0 | 1 | 1 | Aug 21, 2024 | H2H |