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 |
H2H data updated: 2026-09-13 00:00 UTC
Carol Zhao vs Dayeon Back H2H: 1-0
Carol Zhao holds a 1–0 lead over Dayeon Back in their WTA head-to-head. Across 1 main-draw meeting, Carol Zhao leads 1–0 on hard courts. Most recently, Carol Zhao won the 2024 Korea Open first round 6-4 6-1.
Want to explore more matchups? Advanced rivalry search lets you browse current and historical rivalries, unbeaten records, or every matchup for a player.
H2H
1
–
0
1 main-draw meetings
H2H Match Log
| Player | Score | Player | Match Data | Date | Round | Tournament | Category | Surface |
|---|---|---|---|---|---|---|---|---|
| Carol Zhao | 6-4 6-1 | Dayeon Back | Match data | Sep 19, 2024* | R32 | Korea Open | WTA 500 | Hard |
Estimated match date where the exact historical date is unavailable. 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Carol Zhao | #432 | #131 | 458 | 1,515 | 5 | 21 | 19.2% | 0 | 0 | 0 | 0 | 0 | 0 |
| Dayeon Back | #268 | #245 | 299 | 1,541 | 1 | 4 | 20.0% | 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 | Carol Zhao | Dayeon Back | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | W-L | Win % | Rank | Elo | GS | Titles | Yr | W-L | Win % | Rank | Elo | GS | Titles | |
| 18 | 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 | 2022 | 0–1 | 0.0% | #609 | 1,512 | 0 | 0 |
| 21 | 2016 | 0–2 | 0.0% | #498 | 1,462 | 0 | 0 | 2023 | 1–1 | 50.0% | #457 | 1,526 | 0 | 0 |
| 22 | 2017 | 0–1 | 0.0% | #149 | 1,452 | 0 | 0 | 2024 | 0–1 | 0.0% | #316 | 1,506 | 0 | 0 |
| 23 | 2018 | 0–3 | 0.0% | #299 | 1,446 | 0 | 0 | 2025 | 0–1 | 0.0% | #307 | 1,501 | 0 | 0 |
| 26 | 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 | Carol Zhao | Dayeon Back | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 % | |||
| 18 | 2013 | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 19 | 2014 | 1 | 1 | 2 | 50.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 20 | 2015 | 0 | 2 | 2 | 0.0% | — | — | — | — | — | — | — | — | 2022 | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — |
| 21 | 2016 | 0 | 2 | 2 | 0.0% | — | — | — | — | — | — | — | — | 2023 | 1 | 1 | 2 | 50.0% | — | — | — | — | — | — | — | — |
| 22 | 2017 | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | 2024 | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — |
| 23 | 2018 | 0 | 2 | 2 | 0.0% | 0 | 1 | 1 | 0.0% | — | — | — | — | 2025 | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — |
| 26 | 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 | — | 3 | 16 | 19 | 15.8% | 1 | 3 | 4 | 25.0% | 1 | 2 | 3 | 33.3% | — | 1 | 4 | 5 | 20.0% | — | — | — | — | — | — | — | — |
Performance Progression by Age
Seasons are aligned by the age each player spent most of that calendar year. 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 | Carol Zhao | Dayeon Back | ||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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% | |
| 18 | 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% | 2022 | 1/1 | 0.0 | 2.0 | 61.5% | 41.7% | 40.0% | 16.7% | 0.0% | 41.0% | 29.3% |
| 21 | 2016 | 2/2 | 2.5 | 4.0 | 57.0% | 59.8% | 34.4% | 46.9% | 41.7% | 49.2% | 39.6% | 2023 | 2/2 | 2.0 | 3.0 | 54.5% | 51.0% | 38.7% | 48.8% | 27.3% | 45.5% | 39.0% |
| 22 | 2017 | 1/1 | 2.0 | 7.0 | 56.3% | 71.4% | 50.0% | 0.0% | 75.0% | 62.1% | 34.1% | 2024 | 1/1 | 0.0 | 2.0 | 55.0% | 54.5% | 25.9% | 40.0% | 22.2% | 41.7% | 42.6% |
| 23 | 2018 | 3/3 | 0.3 | 6.0 | 58.3% | 59.2% | 38.9% | 49.9% | 23.7% | 50.7% | 34.9% | 2025 | 1/1 | 0.0 | 7.0 | 55.2% | 59.5% | 30.0% | 33.3% | 23.1% | 46.3% | 46.9% |
| 26 | 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 | — | 26/26 | 1.8 | 6.8 | 60.5% | 61.0% | 36.6% | 48.4% | 45.3% | 51.7% | 39.0% | — | 5/5 | 0.8 | 3.4 | 56.1% | 51.5% | 34.7% | 37.5% | 20.0% | 44.0% | 39.4% |
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 | Carol Zhao | Dayeon Back | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | |
| 18 | 2013 | 1494 | 101.4 | -1.52 | +2.05 | 0.591 | 37.0% | — | — | — | 0.0% | -4.00 | — | — | — | -0.04 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 19 | 2014 | 1513 | 104.2 | +0.20 | 0.00 | 0.903 | 48.0% | — | — | — | 0.0% | -5.00 | — | — | — | -0.02 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 20 | 2015 | 1489 | 92.9 | -2.27 | -1.66 | 0.653 | 41.1% | — | — | — | 0.0% | -4.75 | — | — | — | +0.27 | 2022 | 1512 | 97.1 | -1.57 | -1.15 | 0.496 | 35.0% | — | — | — | 0.0% | -5.00 | — | — | — | +0.26 |
| 21 | 2016 | 1462 | 102.6 | -0.28 | -1.04 | 0.779 | 44.2% | — | — | — | 20.0% | -2.40 | 0–1 | — | — | +0.02 | 2023 | 1527 | 103.2 | -0.33 | -0.69 | 0.715 | 42.4% | — | — | — | 40.0% | -1.60 | 1–0 | 1–0 | — | -0.06 |
| 22 | 2017 | 1452 | 99.2 | -0.88 | +2.61 | 0.898 | 47.8% | — | — | — | 33.3% | -1.00 | 0–1 | 0–1 | — | +0.11 | 2024 | 1507 | 95.1 | -1.39 | -0.55 | 0.731 | 42.2% | — | — | — | 0.0% | -3.50 | — | — | — | +0.37 |
| 23 | 2018 | 1446 | 88.1 | -1.92 | -3.65 | 0.707 | 42.6% | — | — | — | 25.0% | -2.75 | 0–2 | 1–0 | — | +0.10 | 2025 | 1501 | 102.7 | -2.49 | -0.83 | 0.873 | 46.6% | — | — | — | 0.0% | -2.50 | — | — | — | -0.02 |
| 24 | 2019 | 1448 | 97.7 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 26 | 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 | 93.3 | -2.88 | -1.18 | 0.779 | 45.2% | — | — | — | 33.3% | -1.67 | 0–1 | — | — | -0.03 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Career | — | 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 | — | 1542 | 99.2 | -1.22 | -0.78 | 0.703 | 41.7% | — | — | — | 18.2% | -2.73 | 1–0 | 1–0 | — | +11.00 |
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.
Dayeon Back
all rivalries →| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| Beatriz Haddad Maia | 0 | 1 | 1 | Sep 17, 2025 | H2H |
| Carol Zhao | 0 | 1 | 1 | Sep 19, 2024 | H2H |
| Kimberly Birrell | 0 | 1 | 1 | Oct 13, 2023 | H2H |
| Jelena Ostapenko | 1 | 0 | 1 | Oct 12, 2023 | H2H |
| Na Lae Han | 0 | 1 | 1 | Sep 22, 2022 | H2H |